3” x .03” x 3/8” Cut-Off Wheels by Black Hawk Abrasives 3” x 1/32” x 3/8” Cut Off Wheels by Black Hawk Abrasives are fast cutting, small diameter, ultra-thin abrasive metal cutting wheels. Each 3-inch cutting disc is manufactured with heat-treated aluminum oxide grains, bonded and reinforced with high tensile strength fiberglass webbing. The construction of this 3 inch cutoff disc ensures that despite its thin width it will last long, be safe, and have increased lateral stability.