For removing and installing cassette lockrings on Shimano-compatible freehub bodies and some Centerlock disc brake systems. FEATURES: Fits 12-spline cassette lockrings from Shimano, SRAM, SunRace, SunTour, Chris King and others FR-5.2GT incorporates a specially-sized guide pin that stabilizes the tool when removing cassette lockrings from 12mm thru-axle hubs