Flex Shaft is for the versatility of your project capabilities and improves the product flexibility. It makes your precise project more comfortable and relaxing. 60 various accessories meet the most of your needs in work. 6 Adjustable Rotation Speed - The 135W motor provides powerful power for cutting, grinding, engraving, drilling, cleaning/polishing, etc Speed from 10,000 rpm to 3,2000 rpm lets you set and adjust speed flexibly according to the work contents and the type of materials being used Handy and Comfortable Grip - The main body of the rotating tool adopts streamlined ergonomic design, which makes the hand feel comfortable and easy to operate