DURABLE: long-lasting aluminum oxide abrasive, fiberglass reinforced 4-1/2″ x .040 x 7/8″ T27 Depressed Center Thin Cut-off Wheel provides premium performance and increases productivity. The depressed center design allows the flange/lock nut to recess within the grinding wheel so that it can be used for various grinding and cutting applications When looking for long lasting, high performance cut off wheels, Lincoln Abrasives delivers. Pearl Abrasive Slimcut Pro-V Aluminum Oxide Cut-off Wheel PVCW4532A Type 1 4 1 2 X .040 X 7 8 Cutting Discs DEWALT, Type 27, 4 1/2" X 0.045" X 7/8", Depressed Center Cut-Off Wheel - 49ZZ85|DWA8957F Cut-off Wheels 60 grit aluminum oxide abrasive that is resin bonded for maximum life., SIZE: 4., 5 diameter, 7/8 arbor, ., 040 thickness , TYPE: 27 Diablo Metal Cut-Off Disc with Type Depressed Center is ideal for use when working in hard to reach areas. Provides superior performance Reinforced with 2 full fiberglass sheets for safety. A proprietary aluminum oxide grain combination yields fast, burr free cutting with long life.