Dremel 4000 Series 120V Variable Speed Rotary Tool Kit has a variable speed from 5,000 to 35,000 RPM, allowing you to control the speed of the tool for different applications. The electronic feedback allows for consistent speed at lower and mid-range speeds, making it ideal for detailed work. The soft grip provides comfort and control, even during extended use. This kit includes a variety of accessories, including a circle/cutter/straight edge guide, sanding/grinding guide, storage case, quick start book, high speed cutter, mandrel, mandrel with screw, coarse 1/2-inch sanding drum, felt polishing wheel, polishing compound, carbon steel brush, 1-inch felt polishing wheel, aluminum oxide grinding wheel & stone, multi purpose cutting bit, silicon carbide grinding stone, wrench, 2 each of the following