Application: For cutting common carbon steel, tools steel, stainless steel, hard alloy, nonferrous metals, building material, etc. Machine: Used on portable angle grinder. Usage: grinding weld, cleaning burr & rust, etc. Advantage: perfect grinding performance, low vibration, comfortable handle. Specifications: ABRASIVE GRIT MAX. R.P.M. 100X16 4"X5/8" ZA 60#/80#/100# 15200 125X22.2 5"X7/8" ZA 60#/80#/100# 12200 150X22.2 6"X7/8" ZA 60#/80#/100# 10200 180X22.2 7" X7/8" ZA 60#/80 8500 According to customer's requirements.