Park Tool Bottom Bracket Tool 12 Outer Diameter Blue BBT-47-12, Notches, 50-53mm,

---------------------------------------------------------------------- 【Voltage Compatibility】 When using electrical appliances, please note that they are designed for Japanese voltage specifications (90-110V), so if you use them with a different voltage, it may cause a malfunction. 【Plug Type】 Our products use Japanese plug types (A or B type). Please use a conversion adapter if necessary. 【Important Note on Transformers and Adapters】 A transformer adjusts voltage to match your device’s requirements. A conversion adapter only changes the plug shape and does not adjust voltage. Using only a conversion adapter without a transformer may result in damage to the product. 【Liability】 We are not responsible for malfunctions or damages caused by improper use, such as operating the product without a transformer. ----------------------------------------------------------------------

External BB tools, precisely manufactured using CNC machining. The main body is made of aluminum, which is less likely to scratch the bottom bracket cups. Please attach it to your existing ratchet wrench, torque wrench, or similar tool for use.