The SR-18.2 Chain Whip holds 1/8" fixed-gear sprockets and cassettes in place for easy lockring removal, making it an essential tool for bike maintenance. The SR-12.2 also incorporates a 1" box-end wrench to drive Park Tool Freewheel & Cassette Lockring Tools. The tool is heat-treated to prevent bending or flexing, and features hardened pins to keep the chain in place. Long ergonomic molded handle provides leverage and extra comfort. SR-18.2 FEATURES a Compatible with 1/8" fixed gear sprockets a Compatible with single speed cassettes a 1" (25.4mm) box-end wrench fits Park Tool Freewheel / Cassette Lockring Tools a Length: 35.5 cm (14")