Important Remind: Convex rubber bacjker and pvc pad holder’s max velocity / capacity is 5000 RPM. Please do not use it with high speed grinder or polisher. This package carries (a)-(e). 1 Piece of 5 Diamond Turbo convex cutting blade to do circle shape cutting for granite marble concrete. Inner Hole diameter is 7/8″-5/8″. 1 Piece of 2. ” (50mm Diameter) Zero Tolerance Diamond Grinding Drum Wheel (5/8″-11 Female Thread arbor) for stone concrete granite marble sink hole inner edge polishing, shaping, enlarging. ” (50mm Diameter) Diamond core bit for stone concrete hole cutting (5/8″-11 Female Thread arbor). 1 Piece of 4″ velcro pad holder (5/8″-11 Female Thread arbor). Max velocity / capacity is 5000 RPM. 11 Pieces of 4 Diamond wet dry (wet use recommende) polishing pad for stone concrete. 2 X Grit 50 100 200. 1 X grit 400 800 1500 3000 6000. 4 inch Convex Diamond polishing pads x 7 Pieces. 4 inch 5/8-11 Convex Rubber Backer x 1 Piece. Grits : 50,100,200,400,800,1500,3000 Diameter: 4 inch(100mm) Backer Thread : 5/8-11. Use : ·Installed in the polisher, Grinder, Floor polisher, Air polisher tools etc. Speed / RPM MUST be lower than 5000 RPM. ·Used for grinding and polishing Granite, Marble, Quartz, Terrazzo, Natural stone etc. Attention : ·Before use, please make the necessary protective measures!! ·Starting from 50 grit until end of the 3000 grit ·Usually, does not recommend omitting one of the grit ·Mechanical spindle speed range 2500~5000 RPM ·The correct way to help achieve higher quality results and brightness.