The Park Tool FR-5.2 Cassette Lockring Tool is a workshop essential for drivetrain and brake maintenance. Designed to install and remove cassette and disc brake lockrings with ease, it’s precision-machined from heat-treated steel to deliver the strength and reliability trusted by professional mechanics worldwide.

Compatible with most 12-spline lockrings, including Shimano, SRAM, SunRace, SunTour, and Chris King, the FR-5.2 ensures a secure, accurate fit every time. Built to be used with a 1" wrench or hex driver, it’s a simple yet indispensable tool that brings workshop-quality precision to your maintenance routine.

Key Features

• Fits Shimano®, SRAM® (including 1x), SunRace®, SunTour®, Chris King® and other cassette lockrings
• Also fits some Shimano® disc brake lockrings
• Made in the USA and covered by Park Tool's legendary limited lifetime warranty