Reinforced with fiberglass for increased durability the Fiberglass Reinforced Cut-Off Wheels are ideal for slicing, cutting, grooving, and trimming a variety of materials including hard and soft metals, marble, drywall, and plastic. The cutting discs feature a 1-1/2 In. (31.8 mm) diameter and .045" (1.1 mm) thick blade, and can be used to cut or slot bolts, screws, sheet metal, thin wood and plastic. The 456 includes 10 cut-off wheels.