, 8500 rpm Maximum, Resin Bond, Applicable Materials: Stainless Steel and Harder Steel Grades, Wheel Hardness: T, Yes Reinforced, ANSI B7.1-2010 Specifications Met.Weiler’s Combination Wheels offer flexibility and efficiency when switching between cutting and grinding applications. A third layer of fiberglass reinforcement provides the strength to hold up when grinding, while the type of fiberglass used maintains a fast cut.