Thank You for choosing Konfor to purchase your Diamond Polishing Pads. We really appreciate your business. Konfor diamond polishing pads are 100% brand new and are designed for high polishing performance, cut fast and aggressively. The pads can be wet or dry use, wet polishing can provide great results. This pack carries 5 Pieces of 5 Inch / 125mm Resin (more durable than standard grade polishing pad) Diamond Premium Polishing Pad for concrete granite travertine stone. Package Included: 1 X 50 Grit Polishing Pads 1 X 100 Grit Polishing Pads 1 X 200 Grit Polishing Pads 1 X 400 Grit Polishing Pads 1 X 800 Grit Polishing Pads We also sale same grit for 7pcs set such as Grit 50 of 5 pcs or Grit 100 of 5 pcs, you can make comment about the grit you want when you purchase and Please choose SHIP BY SELLER NOT FBA. If you like to purchase 7 pcs set please refer to ASIN : B074Q12TDY . INSTRUCTIONS: 1. Install the rubber backer on to the variable speed angular hand grinder. 2. Attach the polishing pad Velcro loop side to the backer Velcro loop side, so they form a tight bond. 3. 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. 4. When wet polishing, use a continuous flow of water at low RPM for best results and finish. Also the polisher pad will last longer. 5. In general polishing starts with grit 50 diamond polishing pad, and is consumed more than higher grits diamond polishing pads, grit 1500#, 3000# is less effective for polishing rough surface. 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.