Although it is convenient for maintenance of BB, it is expensive for plate-like products. Considering this price, it seems that it is better to buy another hanger rotation. Although it is in the tool box, unfortunately there are few turns.
Purchased for maintenance of Mama Chari for the hanger-one tool groove type (6 claw type) on one side with this wrench shape. 6 claw type tool is expensive and we can not get it, but we purchased only this tool, but since the bearing has a retainer it can manage grease up and ball push control somehow if it comes off even one side. Since it is a thin mouth, even a little crank adjustment is possible without removing the crank.
When exchanging to cassette type BB, teeth did not stand on monkey wrench, and although I made my own tool with pipe etc., it broke a little after turning. Since it is a tool that is used only once (unnecessary if it is changed to cassette type BB) he hesitated to purchase, but when using this tool, things that could not be removed even for a few days suffered in about 10 minutes. It looks thin in the picture but looks weak, but it was surprisingly solid, so it was okay to rotate while hitting with a hammer.