Unior 1670.5/4 Cassette Lockring Tool Description: The Unior 1670.5/4 Cassette Lockring Tool is designed to install and remove Shimano & SRAM cassettes as well as internally splined Centerlock lockrings. This tool uses hardened tool steel that will shrug off use and abuse, and features specially designed teeth for a tight engagement. The tool can either be attached to a torque wrench with a 1/2" drive for precision when tightening things down, on a 1/2" drive rachet or breaker bar for the removal of tight and stubborn lockrings, or the tool has wrench flats that will accept an adjustable wrench. Features: Hardened tool steel construction will hold up to years of use and abuse 1/2" ratchet drive for use with breaker bars, rachet drivers, and torque wrenches as well as wrench flats for adjustable wrenches Designed to fit into internal splines of cassettes and centerlock brake rotors