Review on Park Tool BBT 22 Shimano Cartridge by Born Waheed

This tool inserts firmly into the slots of standard Shimano bottom bracket spline cups. Despite the relatively soft metal of the cups on the cheap (and now worn out) original sealed cartridge bearing square taper bottom bracket (VP-BC73 68x118mm) on my old bike, this tool was able to extract the cups. without removing the slit on the cups or the instrument. While there are instructions on the tool packaging as to which direction to turn the tool to properly loosen the bottom bracket shells (i.e. which way to turn the tool), a useful rule of thumb is: to loosen the bottom bracket, turn the wrench in the same direction as when cycling, starting on the opposite side first. The direction you need to turn seems counterintuitive to me (and the opposite of what you do to release the pedals on your bike), but it works. As a previous reviewer noted, you can adjust the loose fit between this tool's teeth and the bottom bracket shell with a bolt and some washers; This prevents you from using the square wrench directly (because the screw goes through the square hole), but keeps the tool in place. However, if you're using a deep bit on a square shank wrench, you can still go that route thanks to the tool's hex parts. Alternatively, you can do what I did and attach two wrenches to the tool, pointing in opposite directions, and then turn both of them the same way at the same time. That way you're pretty much loading the tool with a net torque and not letting it "fall" out of the bottom bracket shell.