The Klutch 4in. Beveled Crimped Fine Wire Wheel has fine (0.0118in.) crimped wire for smoother finishes and a 5/8in.-11 arbor with 2 adapters to fit just about any angle grinder on the market. 5/8in.-11 threaded hub has 2 hub adapters (M10 x 1.25 and M10 x 1.5). 12,500 max. RPM.