Usage Note: 1, No need water only for dry , for the wall and outside no water working 2, grinding fast 800#/1500#/3000# can polishing good shine 3, soft pad and very close velcro 4, can use for all stone and artifcial stone ,microcrystalline stone ,special-saped craft and title 5, have 3/5/7/11/14 step packing for the polishing easy use 6, can use the hand maching small grinder and auto machine and floor machine 7, grit:10/30/50/100/150/200/300/400/500/600/800/1000/1200/1500/2000/3000/ 6000/8000/10000 and buff 8, size:3/4/5/6/7 inch 9, packing :10pcs/box ,600pcs/ctn (4inch) G.W:21.5KGS, N.W:20.5KGS WARNING: Dry Diamond Polishing Pad max speed rating is 3000 RPM, must be used with dry polishing equipment. NEVER use it at higher RPM grinder or other equipment. It can result into pads flying off, bodily injury and property damage. Wear protective gears for eyes, nose,face, hand and other body parts while using Polishing pad. Polishing grinding generates dust and may cause eye, skin, nose, throat and respiratory track irritation. Don't breathe dust and keep work area adequately ventilated. Continued exposure to silica dust is known for Silicosisrelated disease and fatalities. Always Follow Danger, Warning, Caution and Safety rules of equipment with which pads are used. Never use damaged or cracked pads.