Application: suitable for cutting stainless steel ?hard alloy, etc. Machine:used on portable angle grinder Usage: preparation work before welding, grinding weld, cleaning burr & rust, surface polishing, edge grinding, etc. Advantage: high grinding efficiency, long service life, high cost performance, comfortable for operator. Specifications: D×h×d Abrasive Grit Hardness Max. R.P.M. 100x4x16 4"x1/6"x5/8" Wa 46 Q 15200 100x6x16 4"x1/4"x5/8" Wa 30 Q 15200 125x6x22 5"x1/4"x7/8" Wa 30 Q 12200 150x6x22 6"x1/4"x7/8" Wa 24 Q 10200 180x6x22 7"x1/4"x7/8" Wa 24 Q 8500 According to customer's requirements.