Specification: Diameter-4”, thickness-0.6”/1.5mm, inner hole-0.86”/22mm, Max RPM-13,200, compatible with all 7/8” angle grinders, 5 packs. Composition: This indestructible cutting disk is made of diamond high-manganese steel base which is long lasting for cutting everything. Abrasive Edge Width: The edge abrasive width of the cutting wheel is 0.4 inch which is much wider than most similar products on the market. Versatile Use: The angle grinder cutting disc is ideal for cutting PVC pipes, steel pipes, iron pipes, angle iron, corrugated steel roofing, tiles, marble, granite, wood, and more High Cutting Efficiency: Provides clean and precise cuts with smooth edges Keywords: indestructible disc, grinder disc, concrete blade for angle grinder, metal cutting discs, circular saw blade 5 Packs 4 Inch Indestructible Disc for Grinder