The foam backing of these sanding pads is soft and to hold. hand pads can be used as stone polishing pads, tile polishing pads, ceramic polishing pads, polishing pads, concrete polishing pads, and can be used for tile trimming, wood deburring, glass burr trimming, metal polishing and renovation, etc. pads include particle sizes of 60#, 100#, 200#, and 400#. One set can meet most of your polishing work. 60 grit core pad for fast rough sanding, such as polishing floor tiles and general . Grits 100 and 200 are medium rough and may remove fine detail. Grit 400 for fine polishing. Wet polishing/dry polishing is fine, wet polishing is better. Suitable for all kinds of materials from coarse to fine: the finer the sand, the better the polishing effect; the coarser the sand, the better the polishing effect. Help you quickly solve problems such as chipping, burrs, and edging that you often encounter in life., Weight: 0.2535316013 pounds, Manufacturer: puhae