The bottom bracket wrench have 12 teeth goes over halfway around the bracket. This tool can help you to clean the bottom bracket, adjust the cups or replace bearings easily. The other end of the tool has the hard plastic bit needed to tighten the crank arm adjustment cap. The wrench is made of high-carbon steel, Long time high temperature hardening heat treatment, Durable. Please kindly be noted that this tool is for the original Shimano Hollowtech Bottom Bracket cups. Dimension: Diameter: 45mm(1.77inch), Total length: 220mm(8.67inch). Package content: 1 * Bicycle Wrench
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