... , high grinding speed, good grinding surface polishing.3).Usage: Metal, automobile, hardware, musical instrument, glass, ceramics, wood, upholstery, etc.4 ... Mainly grinding and polishing for automobile, paint, wood, stone, metal and so on .Velcro disc with holes is better for ... not be harmed and there is no pollution.Suitable for metal, wood, automobiles, and furniture, especially for fine finishing. ...