Park Tool CT-5 Compact Chain Tool. The CT-5 Chain Tool performs like a shop-quality tool in a lightweight compact size that easily fits in a saddle bag or mobile mechanics tool roll. The CT-5 removes and installs pins on all 5-to-12-speed derailleur chains including newer SRAM 12-speed designs. The integrated loosening shelf is useful for adjusting tight links on older style chains.

Compatible with all 5-speed to 12-speed bicycle chains* including SRAM T-Type SRAM Flattop and Shimano XTR 12-speed

Compatible with 3/32" single-speed chains

Compatible with many 1/8" single-speed chains — see the CT-3.3 for guaranteed compatibility with all single-speed chains

Not compatible with 3/16" or half-link single-speed chains

*The CT-5 will install and remove but not peen Campagnolo 11 and 12-speed chain rivets