4-1/2 Inch Wet Polisher Grinder 4" Inch Polishing 12 Pad DVD Granite Concrete One Simple Design Fixed Speed Wet Polisher (NO GFCI breaker. 4950RPM. 420W). 11 Pcs of 4" (3mm Thick) Polishing Pad for granite concrete marble: 2 X Grit 50 100 200, 1 X Grit 400 800 1500 3000 Buff. 1 Pcs of 4" Rubber Velcro Backer/Pad Holder. 1 Pcs of FREE GIFT DVD Copy (tells you about step-by-step polishing).