The Park Tool FR-5.2GT is designed specifically for use when removing and installing cassette lockrings from thru axle hubs. . 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 lockring.
When I had to tighten up my cassette on my new bike I could have taken my bike over to the Local bike shop, but for less money and quicker tan driving one way this did the job.
Add socket and torque wrench and less than a minute you are done. Nicely machined and quality to last at least untill the next generation of tech comes along.