Park Tool CT-5 Mini Bicycle Chain Tool The Park Tool CT-5 performs like a shop-quality bicycle chain tool, in a lightweight (77g) compact size that easily fits in a saddle bag or mobile mechanic's tool roll. The CT-5 removes and installs pins on all 5-to-12-speed derailleur chains*, including SRAM AXS & Shimano XTR 12-Speed Chains. The integrated shelf is useful for loosening tight links on older style chains. The fine thread, special V-shaped handle, and super strong replaceable pin (part # CTP) make chain replacement a breeze. *NOTE: The CT-5 will not peen Campagnolo 11-speed chain rivets (see CT-4.3 or CT-6.3) Park Tool CT-5 Mini Bicycle Chain Tool The Park Tool CT-5 performs like a shop-quality bicycle chain tool, in a lightweight (77g) compact size that easily fits in a saddle bag or mobile mechanic's tool roll. The CT-5 removes and installs pins on all 5-to-12-speed derailleur chains*, including SRAM AXS & Shimano XTR 12-Speed Chains. The integrated shelf is useful for loosening tight links on older style chains. The fine thread, special V-shaped handle, and super strong replaceable pin (part # CTP) make chain replacement a breeze. *NOTE: The CT-5 will not peen Campagnolo 11-speed chain rivets (see CT-4.3 or CT-6.3) CT-3.3 CT-4.3 CT-5 CT-6.3 Common 5-to-12 Speed Chains ✓ ✓ ✓ ✓ Most Single-Speed Chains ✓ ✓ SRAM AXS & Shimano XTR 12-Speed Chains ✓ ✓ ✓ Peens Campagnolo 11 & 12-Speed Chains ✓ ✓ TRUSTED SINCE 1963 Since our origins in the back of a bike shop in 1963, it has been Park Tool's sole mission to design and manufacture high-quality tools that empower mechanics and riders of all skill levels to service their bicycles. As with our other 500+ tools, our chain tools are a product of our decades of experience and expertise in the industry, in the shop and on the trail.