PARK TOOL FR-5. 2GT CASSETTE LOCKRING There is only one right way to remove a cassette from your thru axle rear hub and that is to use a Park Tool FR-5. 2GT. With its 12mm guide, it is designed specifically for use when removing and installing cassette lockrings from thru axle hubs. This one fits 12-spline lockrings found on most SRAM, Shimano, Suntour, and Chris King cassettes as well as many others. Features Utilizes a 12mm guide pin to stabilize the tool in use Fits 12-spline cassette lockrings from Shimano(R), SRAM(R) (including 1x), Sun Race(R), Sun Tour(R), Chris King(R) and others (23. 5mm diameter) Fits some Shimano(R) and similar disc brake rotor lockring Manufacturer's Part No: FR-5. 2GT UPC: 763477003393 | Park Tool | Fr-5. 2Gt Cassette Lockrng Tool Cassette Lockring Tool W/ 12Mm Guide Pin