This shop quality chain whip gives you incredible leverage without worry of slippage, and the head is uniquely shaped to allow quick and accurate access to any cassette.Features:- Works on 7-speed to 12-speed mountain and road bike cassettes as well as single-speed cassettes with a 3/32´´ cog- Hardened bolts hold securely and make chain replacement easy- Heavy duty, heat treated head- Round vinyl coated handle- The SR-2.3 is approximately 15´´ long (38cm)