Dremel 4200-DR-RT High Performance Rotary Tool (Certified Refurbished) Most powerful and versatile rotary tool in the Dremel line up EZ Change system allows for easy accessory changes (Accessories not included) Slim ergonomic body provides a 360 degree grip zone for control in any position The venting design provides 20 percent more cooler running air flow Electronic feedback for consistent power at lower and mid-range speeds