Get it as soon as Fri, Jul 16. FREE Shipping by Amazon. Only 7 left in stock - order soon. IRONWALLS 4" Stone Wet Polisher, 1400W 110V 6-Variable Speed Grinder Electric Polisher Machine with 7PCS Diamond Polishing Pads for Tile, Marble, Granite, Concrete, Cement, Countertop Floor Polishing. 3.0 out of 5 stars.