Metal 12″ (304.8mm) x 3/32″ (2.38mm) a36r-bf type 1 steel cutting wheel with 1″ (25.4mm) arbor. aluminum oxide metal cutting wheel. designed for metal cutting, metal abrasion, body work, metal fabrication and general repair work. used on ferrous materials. designed to be used on chop saws only. iso 9001 certified. wheel size: 12″ thickness: 3/32″ arbor: 1″ spec: a36r-bf max rpm: 5,100 tool type: chop saws