Application: Suitable for cutting common carbon steel,tool steel,cast iron, etc. Machine:Used on portable angle grinder Usage: Grinding weld,cleaning burr & rust,surface polishing, etc. Advantage: High grinding efficiency, long service life, high cost performance, comfortable for operator. Specifications: DHd DHd ABRASIVE GRIT HARDNESS MAX. R.P.M. Packaging 100X4X16 4"X1/6"X5/8" A 46 Q 15200 280 100X6X16 4"X1/4"X5/8" A 30 Q 15200 200 125X6X22 5"X1/4"X7/8" A 30 Q 12200 100 150X6X22 6"X1/4"X7/8" A 24 Q 10200 100 180X6X22 7"X1/4"X7/8" A 24 Q 8500 80 According to customer's requirements.