Authentic Makita Diamond Cutting Disc/WheelType: DrySize: 5″ (125mm)Bore Size: 7/8″ (22.23mm)Segmented (D-52766) & Corrugated (D-52803)For Concrete & MarbleBlade size: Segemented: 1.8mm, Corrugated: 2.2mmMax: 1225080m/s