Secure engagement, easy to use, and fast! The CP-1.2 quickly grips cogs from 9 to 24 teeth with no manual adjustments. A great shop tool, the CP-1.2 is 13.7" (35cm) long and can be used with one hand to hold any 7-speed to 12-speed road or mountain bike cassette solidly during lock ring removal. Also compatible with single-speed cassettes with a 3/32" cog.