Saitech Pipeline - (S Pipe) - Stainless Steel. Designed and manufactured to perform both high performance cutting and light grinding. Long life combined with versatility for the pipeline industry. Stainless steel, high tensile alloys. Ferrous metals (iron, steel, welds, etc.). Specifications: Max RPM - 8500. Tech Info: Only wheel designed for both cutting and light grinding, eliminating the need for 2 separate wheels. Patented 3M Cubitron grain formulation outlasts standard aluminum oxide wheels. All sizes reinforced with the highest quality fiberglass for maximum safety and performance. Super-Lock Hub on all 5/8-11 threaded wheels is the safest, vibration-free design.