Park Tool Mini Brute Chain Tool CT-5

This small chain tool goes anywhere and actually performs like a shop quality tool. The fine thread, special V-shaped handle, and super strong replaceable pin make chain removal and installation a breeze
CT-5 Features
Compatible with 1/8 single-speed and 5 to 12-speed derailleur chains*
Shelf for loosening tight links
Replaceable pin (part # CTP)
Perfect take-along chain tool at only 77 grams
Dimensions: 60mm x 55mm x 15mm
*The CT-5 will not peen Campagnolo 11-speed chain rivets (see CT-4.3 or CT-6.3)