features:<br />--100%  and high quality.<br />--sharp， wear-resistant and high efficiency. optimal rpm 2200， max rpm 12000.<br />--works good for wet or dry polishing of stones.<br />--perfect for granite， concrete， marble， stone， tiles etc.<br />--pro grade wet/dry， diameter 4&quot;， height 3 mm， velcro backed flexible.<br />--aggressive and durable made with quality diamond powder impregnated in resin.<br /><br />specifications:<br />size: 100 mm/4&quot;<br />grits: 30，50，100，200，300，400，500，600，800，1000，1500，2000，3000<br />quantity: 14pcs<br /><br />please note:<br />please add water when you operate.<br /><br />packaged included:<br />1 set polishing pads 14 piece<br />1 piece x grit 30，50，100，200，300，400，500，600，800，1000，1500，2000，3000<br />(1) hook and loop backing pad backer