Size:4 Inch Konfor offers industrial diamond polishing pads and range of tools accessories. Our products with high diamond content, cut fast and aggressively. The pads can be wet or dry use, we recommend WET use. This pack carries 7 Pieces of 4 Inch / 100mm Resin Diamond Premium Wet Polishing Pad(more durable than standard grade polishing pad) for concrete granite travertine stone. Package Included: 1 X 50 Girt Polishing Pads 1 X 150 Girt Polishing Pads 1 X 300 Girt Polishing Pads 1 X 500 Girt Polishing Pads 1 X 1000 Girt Polishing Pads 1 X 2000 Girt Polishing Pads 1 X 3000 Girt Polishing Pads. INSTRUCTIONS: Install the rubber backer on to the variable speed angular hand grinder. Attach the polishing pad Velcro loop side to the backer Velcro loop side, so they form a tight bond. Make sure that the pad is CENTERED on the backer pad. If it is not centered it will shorten the lifespan of the polishing pads. FOR BEST RESULTS AND YOUR SAFETY: Please wear protective eye wear and gloves while operating the grinder. Also add a little water to the surface when you operate.