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Submit Search Nav Menu 2 Nav Menu 3 Nav Menu 4 Nav Menu 5 Nav Menu 6 Nav Menu 7 Nav Menu 8 Home > POWER TOOLS & ACC > POWER TOOL ACCESSORIES > POWER DRILLING & ACCESSORIES > STEP DRILL BITS Find by Pricing Below 32 (6)32 to 44.99 (6)45 to 58.99 (5)59 and Above (15) Find by Brand DIABLO (7)IRWIN (11)MILWAUKEE (14) Sort By: Price: Low to High Price: High to Low Most Popular Title Manufacturer Newest Oldest Availability 30 per page 60 per page 120 per page 180 per page 300 per page 1 2 1/8IN - 1/2IN STEP DRILL BIT Your Price: $25.99 Milwaukee 48-89-9201 Step Drill Bit, 1/8 to 1/2 in Dia, 3-7/64 in OAL, 2-Flute, 1/4 in Dia Shank, Flat Shank Your Price: $25.99 Diablo DSD0500S06 Step Drill Bit, 1/4 to 1/2 in Dia, 3-3/8 in OAL, Dual Flute, 1/4 in Dia Shank, Hex Shank Your Price: $25.99 High speed steel bit with single flute cutting edge for greater control through steps; hex shank prevents slipping in drill chuck. SpeedPoint tip penetrates faster and prevents walking in applications such as drilling holes into thin materials such as stainless steel, copper, brass, aluminum, plastic and laminates. Our line of step drill bits far surpasses the competition. With our single cutting edge design, you will have more control and a cleaner finish. Made of high-speed steel, these new step drill bits are durable and designed to drill through most metals. The black oxide finish prevents corrosion and has great capacity to work with drilling lubricants. The new speed start tip prevents bit walking and allows faster penetration. With laser etched markings you will always know your hole sizes...no guess work! Finally, the 1/4 in hex shank allows for fast bit change in impact drivers and sure grip in chucks. Diablo's new step drill bits bring exclusive technology to the electrician, plumber and HVAC contractor with fast, accurate cuts and increased stability in thin metals, PVC other plastic materials. The innovative split point tip design enables a fast, on-point start resulting in increased durability and up to 4X longer life. An automated precision grinding process on each step reduces wear and delivers 2X faster cuts. Multiple hole sizes are made easy with laser etched step markings while increased step heights for common hole sizes makes drilling holes more efficient and faster. Designed with a 1/4 in hex shank, these bits are impact ready and can be used with drills and impact drivers. Irwin Unibit 10232 Step Drill Bit, 3/16 to 1/2 in Dia, 1-Flute, 1/4 in Dia Shank, Hex Shank Your Price: $27.99 Irwin Unibit 15101ZR Step Drill Bit, 1/8 to 1/2 in Dia, 3-1/4 in OAL, 1-Flute, 1/4 in Dia Shank, Hex Shank Your Price: $27.99 Diablo DSD0500S13 Step Drill Bit, 1/4 to 1/2 in Dia, 3-1/32 in OAL, Dual Flute, 1/4 in Dia Shank, Hex Shank Your Price: $29.99 High-speed steel bit with single flute cutting edge for greater control through steps. Hex shank prevents slipping in drill chuck. SpeedPoint tip penetrates faster and prevents walking in applications such as drilling holes into thin materials such as stainless steel, copper, brass, aluminum, plastic and laminates. Self-starting bit features single flute cutting edge for greater control through steps. Three flatted shanks prevent slipping in drill chuck. SpeedPoint tip penetrates faster and prevents walking in applications such as drilling holes into stainless steel, copper, brass, aluminum, plastic, laminates and other thin materials up to 1/8 in thick. Diablo's new step drill bits bring exclusive technology to the electrician, plumber and HVAC contractor with fast, accurate cuts and increased stability in thin metals, PVC other plastic materials. The innovative split point tip design enables a fast, on-point start resulting in increased durability and up to 4X longer life. An automated precision grinding process on each step reduces wear and delivers 2X faster cuts. Multiple hole sizes are made easy with laser etched step markings while increased step heights for common hole sizes makes drilling holes more efficient and faster. Designed with a 1/4 in hex shank, these bits are impact ready and can be used with drills and impact drivers. Diablo DSD0750S09 Step Drill Bit, 3/8 to 3/4 in Dia, 2-19/32 in OAL, Dual Flute, 1/4 in Dia Shank, Hex Shank Your Price: $32.99 Milwaukee 48-89-9202 Step Drill Bit, 3/16 to 1/2 in Dia, 3-5/64 in OAL, 2-Flute, 1/4 in Dia Shank, Flat Shank Your Price: $34.99 Irwin Unibit 10233 Step Drill Bit, 1/4 to 3/4 in Dia, 1-Flute, 3/8 in Dia Shank, Hex Shank Your Price: $39.99 Diablo's new step drill bits bring exclusive technology to the electrician, plumber and HVAC contractor with fast, accurate cuts and increased stability in thin metals, PVC other plastic materials. The innovative split point tip design enables a fast, on-point start resulting in increased durability and up to 4X longer life. An automated precision grinding process on each step reduces wear and delivers 2X faster cuts. Multiple hole sizes are made easy with laser etched step markings while increased step heights for common hole sizes makes drilling holes more efficient and faster. Designed with a 1/4 in hex shank, these bits are impact ready and can be used with drills and impact drivers. Our line of step drill bits far surpasses the competition. With our single cutting edge design, you will have more control and a cleaner finish. Made of high-speed steel, these new step drill bits are durable and designed to drill through most metals. The black oxide finish prevents corrosion and has great capacity to work with drilling lubricants. The new speed start tip prevents bit walking and allows faster penetration. With laser etched markings you will always know your hole sizes...no guess work! Finally, the 1/4 in hex shank allows for fast bit change in impact drivers and sure grip in chucks. High-speed steel bit with single flute cutting edge for greater control through steps. Hex shank prevents slipping in drill chuck. SpeedPoint tip penetrates faster and prevents walking in applications such as drilling holes into thin materials such as stainless steel, copper, brass, aluminum, plastic and laminates. Irwin Unibit 10220 Step Drill Bit, 9/16 to 1 in Dia, 1-Flute, 7/16 in Dia Shank, Hex Shank Your Price: $39.99 Diablo DSD0875S12 Step Drill Bit, 3/8 to 7/8 in Dia, 2-3/4 in OAL, Dual Flute, 1/4 in Dia Shank, Hex Shank Your Price: $39.99 Milwaukee 48-89-9203 #3 Step Drill Bit, 1/4 to 3/4 in Dia, 2-37/64 in OAL, Straight Flute, 2-Flute Your Price: $39.99 Hole enlarging features bit single flute cutting edge for greater control through steps and a true round hole, 3 flatted shank prevents slipping in drill chuck. Used in applications such as drilling holes into thin stainless steel, copper, brass, aluminum, plastic and laminates, pilot hole required. Diablo's new step drill bits bring exclusive technology to the electrician, plumber and HVAC contractor with fast, accurate cuts and increased stability in thin metals, PVC other plastic materials. The innovative split point tip design enables a fast, on-point start resulting in increased durability and up to 4X longer life. An automated precision grinding process on each step reduces wear and delivers 2X faster cuts. Multiple hole sizes are made easy with laser etched step markings while increased step heights for common hole sizes makes drilling holes more efficient and faster. Designed with a 1/4 in hex shank, these bits are impact ready and can be used with drills and impact drivers. Milwaukee? step drill bits with jam-free performance feature a dual flute design delivering up to 2X faster hole times, up to 4X longer life and up to 50% more holes per battery charge than competitors. Ideal for drilling small and large diameter holes in steel and plastic, these bits are optimized for cordless drills in high speed. The Rapid Strike? tip allows for a fast and accurate start that generates less heat, resulting in longer bit tip life. Black oxide coating also enhances durability, hole quality and bit life. For user convenience and accuracy, each bit has laser-engraved reference marks you can see while drilling. The three-flat Secure-Grip? shank ensures a solid connection with the drill chuck. The #3 step drill bit has 9 hole sizes in 1/16 in increments ranging from 1/4 to 3/4 in. Jam-free performance in high-speed with most professional 18 V cordless drills with Lithium-Ion battery technology. Irwin Unibit 10234 Step Drill Bit, 3/16 to 7/8 in Dia, 1-Flute, 3/8 in Dia Shank, Hex Shank Your Price: $45.99 Irwin Unibit 15103ZR Step Drill Bit, 1/4 to 3/4 in Dia, 2-1/2 in OAL, 1-Flute, 3/8 in Dia Shank, Hex Shank Your Price: $49.99 Milwaukee 48-89-9204 Step Drill Bit, 3/16 to 7/8 in Dia, 2-61/64 in OAL, 2-Flute, 3/8 in Dia Shank, Flat Shank Your Price: $49.99 High-speed steel bit with single flute cutting edge for greater control through steps. Hex shank prevents slipping in drill chuck. SpeedPoint tip penetrates faster and prevents walking in applications such as drilling holes into thin materials such as stainless steel, copper, brass, aluminum, plastic and laminates. Self-starting bit features single flute cutting edge for greater control through steps. Three flatted shanks prevent slipping in drill chuck. SpeedPoint tip penetrates faster and prevents walking in applications such as drilling holes into stainless steel, copper, brass, aluminum, plastic, laminates and other thin materials up to 1/8 in thick. Our line of step drill bits far surpasses the competition. With our single cutting edge design, you will have more control and a cleaner finish. Made of high-speed steel, these new step drill bits are durable and designed to drill through most metals. The black oxide finish prevents corrosion and has great capacity to work with drilling lubricants. The new speed start tip prevents bit walking and allows faster penetration. With laser etched markings you will always know your hole sizes...no guess work! Finally, the 1/4 in hex shank allows for fast bit change in impact drivers and sure grip in chucks. Milwaukee 48-89-9208 #8 Step Drill Bit, 1/2 to 1 in Dia, 3-17/64 in OAL, Straight Flute, 2-Flute, 3/8 in Dia Shank Your Price: $49.99 Milwaukee 48-89-9209 Step Drill Bit, 7/8 to 1-1/8 in Dia, 2-61/64 in OAL, 2-Flute, 3/8 in Dia Shank, Flat Shank Your Price: $55.99 Irwin Unibit 15104 Step Drill Bit, 3/16 to 7/8 in Dia, 3 in OAL, Tree Flute, 1-Flute, 3/8 in Dia Shank, Round Shank Your Price: $59.99 Milwaukee? step drill bits with jam-free performance feature a dual flute design delivering up to 2X faster hole times, up to 4X longer life and up to 50% more holes per battery charge than competitors. Ideal for drilling small and large diameter holes in steel and plastic, these bits are optimized for cordless drills in high speed. The Rapid Strike? tip allows for a fast and accurate start that generates less heat, resulting in longer bit tip life. Black oxide coating also enhances durability, hole quality and bit life. For user convenience and accuracy, each bit has laser-engraved reference marks you can see while drilling. The three-flat Secure-Grip? shank ensures a solid connection with the drill chuck.. The #8 step drill bit has 9 hole sizes in 1/16 in increments ranging from 1/2 to 1 in. Jam-free performance in high speed with most professional 18 V cordless drills with Lithium-Ion battery technology. Our line of step drill bits far surpasses the competition. With our single cutting edge design, you will have more control and a cleaner finish. Made of high-speed steel, these new step drill bits are durable and designed to drill through most metals. The black oxide finish prevents corrosion and has great capacity to work with drilling lubricants. The new speed start tip prevents bit walking and allows faster penetration. With laser etched markings you will always know your hole sizes...no guess work! Finally, the 1/4 in hex shank allows for fast bit change in impact drivers and sure grip in chucks. Self-starting bit features single flute cutting edge for greater control through steps. Three flatted shanks prevent slipping in drill chuck. SpeedPoint tip penetrates faster and prevents walking in applications such as drilling holes into stainless steel, copper, brass, aluminum, plastic, laminates and other thin materials up to 1/8 in thick. Irwin Unibit 10239 Step Drill Bit, 7/8 to 1-1/8 in Dia, 1-Flute, 7/16 in Dia Shank, Hex Shank Your Price: $59.99 Milwaukee SHOCKWAVE Impact Duty 48-89-9244 Step Drill Bit, 3/16 to 7/8 in Dia, Spiral Flute, 2-Flute, Hex Shank Your Price: $59.99 Diablo DSD1125S17 Step Drill Bit, 7/8 to 1-1/8 in Dia, 3-1/32 in OAL, Dual Flute, 1/4 in Dia Shank, Hex Shank Your Price: $59.99 High-speed steel bit with single flute cutting edge for greater control through steps. Hex shank prevents slipping in drill chuck. SpeedPoint tip penetrates faster and prevents walking in applications such as drilling holes into thin materials such as stainless steel, copper, brass, aluminum, plastic and laminates. Our SHOCKWAVE Impact Duty step bits are engineered to deliver the most durable and fastest impact step bit hole drilling solution. Our step drill bits are made in the USA with global materials and give you best in class performance in impact drivers with the versatility to be used in drills. The 1/4 in hex shank has an optimized SHOCKZONE body providing you with the industry???s most durable shank, reducing early shank breaks. A titanium aluminum nitride coating helps deliver you 5X longer life, while the step drill bit's Rapid Strike tip and dual spiral flute produce 2X faster holes. Our 1/8 to 1/2 in step bit features 13 steps with laser engraving for a clear stop on size identification. Diablo's new step drill bits bring exclusive technology to the electrician, plumber and HVAC contractor with fast, accurate cuts and increased stability in thin metals, PVC other plastic materials. The innovative split point tip design enables a fast, on-point start resulting in increased durability and up to 4X longer life. An automated precision grinding process on each step reduces wear and delivers 2X faster cuts. Multiple hole sizes are made easy with laser etched step markings while increased step heights for common hole sizes makes drilling holes more efficient and faster. Designed with a 1/4 in hex shank, these bits are impact ready and can be used with drills and impact drivers. Diablo DSD1375S15 Step Drill Bit, 7/8 to 1-3/8 in Dia, 2-29/32 in OAL, Dual Flute, 3/8 in Dia Shank, Hex Shank Your Price: $64.99 Irwin Unibit 10235 Step Drill Bit, 1/4 to 1-3/8 in Dia, 3-1/8 in OAL, 1-Flute, 1/2 in Dia Shank, Hex Shank Your Price: $67.99 Irwin Unibit 10502ZR Step Drill Set, 3-Piece, HSS Your Price: $67.99 Diablo's new step drill bits bring exclusive technology to the electrician, plumber and HVAC contractor with fast, accurate cuts and increased stability in thin metals, PVC other plastic materials. The innovative split point tip design enables a fast, on-point start resulting in increased durability and up to 4X longer life. An automated precision grinding process on each step reduces wear and delivers 2X faster cuts. Multiple hole sizes are made easy with laser etched step markings while increased step heights for common hole sizes makes drilling holes more efficient and faster. High-speed steel bit with single flute cutting edge for greater control through steps. Hex shank prevents slipping in drill chuck. SpeedPoint tip penetrates faster and prevents walking in applications such as drilling holes into thin materials such as stainless steel, copper, brass, aluminum, plastic and laminates. Irwin Unibit Step Drill Set, HSS, Number of Pieces: 3, Includes: #1, #2, #3 Unibits Milwaukee SHOCKWAVE Impact Duty 48-89-9249 Step Drill Bit, 7/8 to 1-1/8 in Dia, Spiral Flute, 2-Flute, Hex Shank Your Price: $79.99 Milwaukee 48-89-9234 #4 Step Drill Bit, 3/16 to 7/8 in Dia, 2-Flute, 3/8 in Dia Shank, 3-Flat Shank Your Price: $79.99 Milwaukee 48-89-9212 Step Drill Bit, 7/8 to 1-3/8 in Dia, 3-1/16 in OAL, Straight Flute, 2-Flute, 1/4 in Dia Shank Your Price: $82.99 Our SHOCKWAVE Impact Duty step bits are engineered to deliver the most durable and fastest impact step bit hole drilling solution. Our step drill bits are made in the USA with global materials and give you best in class performance in impact drivers with the versatility to be used in drills. The 1/4 in hex shank has an optimized SHOCKZONE body providing you with the industry???s most durable shank, reducing early shank breaks. A titanium aluminum nitride coating helps deliver you 5X longer life, while the step drill bit's Rapid Strike tip and dual spiral flute produce 2X faster holes. Our 1/8 to 1/2 in step bit features 13 steps with laser engraving for a clear stop on size identification. Our line of step drill bits far surpasses the competition. With our single-cutting edge design, you will have more control and a cleaner finish. Made of high-speed steel, these new step drill bits are durable and designed to drill through most metals. The black oxide finish prevents corrosion and has great capacity to work with drilling lubricants. The new speed start tip prevents bit walking and allows faster penetration. With laser etched markings you will always know your hole sizes, no guess work. Finally, the three-flat shank on the largest bit prevents slipping while the 1/4 in hex shank on the two smaller bits allows for fast bit change in impact drivers and sure grip in chucks. Our line of step drill bits far surpasses the competition. With our single cutting edge design, you will have more control and a cleaner finish. Made of high speed steel, these new step drill bits are durable and designed to drill through most metals. The black oxide finish prevents corrosion and has great capacity to work with drilling lubricants. The new speed start tip prevents bit walking and allows faster penetration. With laser etched markings you will always know your hole sizes no guess work! finally, the 1/4 in hex shank allows for fast bit change in impact drivers and sure grip in chucks. Milwaukee 48-89-9205 #5 Step Drill Bit, 1/4 to 1-3/8 in Dia, 3-3/64 in OAL, Straight Flute, 2-Flute Your Price: $84.99 Milwaukee 48-89-9221 Step Drill Bit Set, Dual Flute, 3-Piece, HSS, Black Oxide Your Price: $97.99 Milwaukee 48-89-9239 #9 Step Drill Bit, 7/8 to 1-1/8 in Dia, 2-Flute, 3/8 in Dia Shank, 3-Flat Shank Your Price: $99.99 Milwaukee? step drill bits with jam-free performance feature a dual flute design delivering up to 2X faster hole times, up to 4X longer life and up to 50% more holes per battery charge than competitors. Ideal for drilling small and large diameter holes in steel and plastic, these bits are optimized for cordless drills in high speed. The Rapid Strike? tip allows for a fast and accurate start that generates less heat, resulting in longer bit tip life. Black oxide coating also enhances durability, hole quality and bit life. For user convenience and accuracy, each bit has laser-engraved reference marks you can see while drilling. The three-flat Secure-Grip? shank ensures a solid connection with the drill chuck. The #5 step drill bit has 10 hole sizes in 1/8 in increments ranging from 1/4 to 1-3/8 in. Jam-free performance in high-speed with most professional 18 V cordless drills with Lithium-Ion battery technology. Milwaukee? step drill bits with Jam-Free performance feature a dual-flute design delivering up to 2X faster hole times, up to 4X longer life and up to 50% more holes per battery charge than competitors. Ideal for drilling small and large-diameter holes in steel and plastic, these bits are optimized for cordless drills in high speed. The Rapid Strike? tip allows for a fast and accurate start that generates less heat, resulting in longer bit tip life. Black oxide coating also enhances durability, hole quality and bit life. For user convenience and accuracy, each bit has laser-engraved reference marks you can see while drilling. The 3-flat Secure-Grip? shank ensures a solid connection with the drill chuck. The step drill bit three-piece set includes bits #1 (48-89-9201), #2 (48-89-9202) and #4 (48-89-9204). Jam-Free performance in high speed with most professional 18 V cordless drills with Lithium-Ion battery technology. Our line of step drill bits far surpasses the competition. With our single-cutting edge design, you will have more control and a cleaner finish. Made of high-speed steel, these new step drill bits are durable and designed to drill through most metals. The black oxide finish prevents corrosion and has great capacity to work with drilling lubricants. The new speed start tip prevents bit walking and allows faster penetration. With laser etched markings you will always know your hole sizes, no guess work. Finally, the three-flat shank on the largest bit prevents slipping while the 1/4 in hex shank on the two smaller bits allows for fast bit change in impact drivers and sure grip in chucks. 1 2