Cut-Off Wheel, Metal (for Aluminum) Type 27, Depressed Center, 4-1/2" X .045" X 7/8" Arbor, AL46N-BF. Aluminum oxide metal cutting wheel. Designed for metal cutting, metal abrasion, body work, metal fabrication and general repair work. Used on aluminum and other non-ferrous materials. Designed to be used on right angle grinders only. Quantity discounts available. ISO 9001 certified. Wheel Size: 4-1/2" Thickness: .045" Arbor: 7/8" Spec: AL46N-BF Max RPM: 13,580 Tool Type: Right Angle Grinder