... grinding machines.Characteristic:Diamond & metal & Buff diskhe polishing and cutting efficiency is high, abrasion strength is very ... 50#, 200#, 400# Resin-bonded Disc: fine and finish grinding/polishing. 500#, 800#, 1500#, 3000# Color: black, white, gray ... good durability,high performance/price ratioResin disc500#,800#,1500#,3000#Shape, good durability,nice polishing effectionPolishing disc(Lux)LUX ...