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It's tough to pull out your bottom bracket with your hands, so we recommend using a specially designed tool if you ever, you know, actually want to get it done. Pedro's Bottom Bracket Wrench 16x39 fits 16-notch, 39mm bottom bracket cups, which basically means that it works with Shimano's XTR BB93 and Dura-Ace BB9000. So, if that's what you're working on, this is the wrench you need. The laser-cut 4mm steel head won't slip, bend, or break, and the strategically cushioned grip helps your hands from getting beaten up while you wrench.