Dremel 69-Piece Cutoff Wheel Set includes 69 assorted cutting pieces that allow you to cut metal, wood, and plastic. You can also use it to cut or slot bolts, screws, sheet metal, thin wood, and plastic. The cutoff wheels are made of high-quality steel and are designed for use with Dremel rotary tools. The mandrels are made of steel and are designed to hold the cutoff wheels securely. The accessories include a carrying case, a safety glasses, and a dust mask. This set is a great addition to any Dremel rotary tool kit.