Diamond Polishing Pads 50-200 grit pads for coarse grinding, can be used wet or dry, but use with water for best results. Recommended speed: 1500-2500RPM. 300-8000 grit pads for polishing must be used with water for best results. Recommended speed: 3000-3500RPM, the maximum speed does not exceed 4500RPM. Wide Applications Suitable for stone polishing, line chamfering, curved plate and special-shaped stone processing, and can also be used for special-shaped processing, repair and renovation of marble, cobblestone, ceramics and ceramic tiles. Easy to Install First, Connect the rod. Then, attach the hook and loop side of the polishing pad to the hook and loop side of the backing holder pad. Finally install the pad set on the grinder or polisher. Never use a high-speed grinder and exceed the rated speed. Features Nylon velvet, firmly bonded, can be repeatedly torn and pasted. Surface of the backer pad is arranged with hooks, which are attached closely for sticking ability. Can change polishing pads just in seconds. Strong grinding power and good heat resistance. Tips Clean the work surface before use. Otherwise, the grinding effect will be affected. Make sure the pad is centered on the backing plate. If it is not centered, it will shorten the life of the polishing pad. Always wear protection for your eyes, nose, mouth and hands.