The Dremel? 3100 is the result of upgrading our most popular rotary tool using user-requested features to improve the tool's design and ergonomics. The tool also features the EZ Twist? nose cap with an integrated wrench that allows the nose cap to be used as a wrench to tighten accessories and eliminates the need for a separate wrench. A more efficient fan design and side vents provide a cooler running tool making it comfortable for extended periods of use. The tool also features a symmetrical design including a trumpet-shaped nose cap to facilitate a pencil-grip tool hold. The ability to use all existing Dremel? rotary tool accessories and most attachments let the 3100 complete a wide range of applications including cutting, grinding, sanding, carving and polishing a variety of materials.

The Dremel? 4000 variable-speed rotary tool kit offers the highest performance and most versatility of all Dremel? rotary tools. The increased strength of its motor and electronic feedback circuitry enables consistent performance at all speed levels. Ergonomics include a slim design that provides a 360 deg grip zone for added comfort and control. The Dremel? 4000 can use all existing Dremel? rotary tool accessories and attachments, as well as high-performance attachments, so you can do more with just one tool. 2 years warranty.