Remind: The velcro pad holder, cup wheel and core drill bit’s arbor is 5/8-11 female thread. Important Remind: Velcro backer’s max velocity / capacity is 5000RPM. Please don’t use it with high speed grinder / polisher. (a) 1 Piece of 5 Diamond Turbo Row Grinding cup wheel for concrete granite travertine surface grinding. (with 5/8-11 female thread arbor). (b) 20 Pieces of 5 Diamond Polishing Pad for granite marble concrete. 5 X Grit 50. 4 X Grit 100 200. 3 X Grit 400. 1 X Grit 800 1500 3000 6000. 3,2mm thickness. Recommend 2500 – 5000 rpm. Wet or dry use (wet use recommended). (c) 1 Piece of 1 3/8″ / 35mm Diameter (Ultra High Segment: 9mm High) Diamond Core Drill Bit for concrete granite marble travertine hole cut (with 5/8″-11 female thread arbor). (d) 1 Piece of (5/8″-11 Female Thread arbor) 5″ Velcro Backer/Pad Holder.