The Firepower 1423-3150 Type 1 Abrasive Cut-Off Wheel for Metal measures 4 Inch x 1/32-inch x 3/8-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: 18,000. Grade: A60T2FG.