Pads can be wet or dry use (wet use recommended). This package (a)-(b). (a) 1 Piece of. Rubber Backing Pad 5″ Extra Flexible Backer Pad Hook Loop Backer 5/8″-11 Female Thread arbor. Remind: velcro backer’s max capacity / velocity is 5000RPM, please don’t use it with high speed polisher/grinder. Description: Super flexible rubber backer pad are designed for connecting polishing tool and polishing pads. It is thin and super flexible, more suitable for polishing edges. The connection is 5/8-11 Female Thread. We use top quality Hook and Loop Self adhesive. It will not peel off. (b) 27 Pieces of 5 / 125MM Diameter Pad for granite marble concrete travertine they can be wet or dry use. Wet use make its life longer. 9 Pieces of STEP 1, STEP 2, STEP 3. Recommend 2800 – 5000 rpm (grinder or polisher speed must be lower than 5000 RPM). Wet or dry use (wet use recommended).