Diamond Polishing Pads 3 inch 4 inch Wet/Dry Granite Stone Glass Concrete Marble. Size : 3 inch – 80mm / 4 inch – 100mm. Diameter 80mm- Bore 12mm. Diameter 100mm- Bore 16mm. Grit: 50# 100# 150# 200# 300# 400# 500# 600# 800# 1000# 1500# 2000# 3000#. Wet Dry polishing grinder. Perfect for Granite, Concrete, Marble, Stone, Tiles glass sanding and polishing etc. Diamond polishing pads are used for polishing, honing, restoring/cleaning, grinding or shaping natural stone floor, cultured stone floor, concrete granite marble countertop etcwith polishing tools like Wet grinder polisher, floor polisher, grinder etc. This is very handy diamond tool for Granite polishing, Concrete polishing, Marble polishing, Terrazzo polishing, engineered stone polishing, Travertine polishing and their restoration etc. Accessories for grinders, floor polishers and other diamond tools for polishing. For polishing, repairings, cleaning, sanding or shaping of natural stone floors, artificial stone floors, ceramics, concrete granite marble countertops, etc. We care about our valued buyers, if you have any questions, our Customer Service staffs will be very glad to help you. We try our best to reply to your emails as soon as possible, however, due to high volume of daily incoming emails and time zone difference, we may not be able to reply your emails immediately. We will try our best to deal with the problem to make you.