Review on Park Tool BBT 22 Shimano Cartridge by Mido Taylor

Excellent quality. I had another softer metal park tool and ended up busting (but the cartridge didn't bulge). The local mechanic also couldn't remove the cartridge and offered to buy a new bike. Then I decided to try again and bought this item. It is made of very hard steel and does not slip easily. To make sure it would fit snugly on the cartridge I threaded a long screw through it and screwed it into the crank hole. On the other side I put a washer so it snaps into the cartridge. Eventually, with the help of my son, I was able to easily remove the cartridge (he was holding the bike, I used a long wrench to put pressure on that connector).