The Firepower 1423-3185 Type 1 Abrasive Cut-Off Wheel for Metal measures 4-1/2 Inch x 1/8-inch x 7/8-inch. Firepower double reinforced cut-off wheels are designed for heavy duty cut-off jobs using circular saws, chop-saws and straight grinding machines. They ensure optimum effectiveness for dry applications on a broad range of ferrous and nonferrous metals, soft ceramics, masonry materials, reinforced plastic and fiber glass. Most Firepower cut-off wheels are double reinforced with two layers of fiber glass. Maximum RPM: 13,300. Grade: A46T2FG.