Foundation Bottom Bracket Tool 16-Notch 39mm An essential tool for any shop As bottom bracket standards evolve to meet the needs of riders and updated bike designs, it's important to have the right tools to work on them. This Foundation Bottom Bracket Tool is a key part of any home bike shop. In combination with a wrench, this tool makes quick work of installing and removing Shimano 39mm, 16-notch external threaded bottom brackets (including Dura-Ace 9000 and XTR BB93) This tool features 1/2" driver compatibility for use with a ratchet or torque wrench, and 24mm external wrench flats for an open-end or adjustable wrench. The precision CNC-machined tool is made from a durable alloy, making it more friendly to bottom brackets, with the rugged durability needed for regular use. Features Compatible with 39mm OD, 16-notch Shimano threaded bottom brackets including Dura-Ace 9100/9000, and XTR BB93 external threaded bottom brackets Precise, CNC-machined alloy construction combines long-lasting durability with a bottom bracket-friendly material Wrench compatibility features a 1/2" driver interface for a ratchet or torque wrench, as well as a 24mm open-end wrench interface Specifications Bottom Bracket Compatibility16-Notch, 39mm OD Shimano Bottom Brackets (Dura-Ace R9100/R9000, XTR BB93)Wrench Compatibility 1/2" Driver or 24mm Spanner Material CNC Aluminum | Foundation | Bottom Bracket Tool 16 Notch 39-40Mm Bottom Bracket Tool 16 Notch 39-40Mm