This cutting disc made of a hard abrasive, with a diameter of 1-1/4 inches (32.0 mm) and a thickness of 0.0625 inches (1.6 mm). It is ideal for cutting, grooving and trimming all kinds of materials, including metal, wood and ceramics. You can use it to cut screws and rusted bolts, make slots in screw heads, trim castings and more.