CNC Alloy Bottom Bracket Tool Rugged, thoroughly engineered shop-quality bike bottom bracket tool with classic Lezyne styling. Machined from premium 7075-T6 aluminium with a slick anodized black finish, the CNC Alloy BB Tool is a long-lasting premium shop tool for everyone from professional bike mechanics to recreational cyclists looking to upgrade their home workshop. It’s compatible with a socket wrench or 32mm open-end wrench (including our CNC Rod), and features a knurled circumference, making this a highly versatile bottom bracket tool. Also features an 8 spline Shimano cap tool (39mm, 41mm, 44mm) or a 16mm hex tool (46mm).