The Park Tool FR-5.2GT Cassette Tool with 12mm Pin is designed specifically for use when removing and installing cassette lockrings from thru axle hubs.   Park Tool FR-5.2GT Cassette Tool with 12mm Pin Features Utilizes a 12mm guide pin to stabilize the tool in use Fits 12-spline cassette lockrings from Shimano® , Sram® (including 1x), Sunrace® , Suntour® , Chris King® and others (23.5mm diameter) Fits some Shimano® and similar disc brake rotor lockrings Made in the USA