Bbb bottom bracket tool pullstar btl20lall about cycling bbb think of the details so you dont have to founded by a former road racer they continue to make products with the explicit understanding of what makes a proper bike product that only a rider could have featuresbottom bracket tool for shimano type bottom bracketscompatible with traditional octalink and isis modelsscrew on blocking mechanismextra long handle version allows you to apply more torque than the standard bottom bracket too