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The Topeak Ratchet Rocket offers mini tool convenience with the speed of a reversing ratchet. Featuring a fine tooth ratchet mechanism with reverse lever and thumb wheel for quick rotation and control in tight spots. The 11 hardened steel tools include 2,2.5,3,4,5,6mm hex, #2 phillips and T25 Torx bit. The ratchet tool snaps into an integrated chain tool and bit storage box. The chain tool is compatible with all single speed and most multi-speed chains, including 10 speed hollow pin chains (not compatible with 11 speed chains).