16-Notch Bottom Bracket Tool - Black | Precision Fit for 41mm OD Threaded BB | Compatible with Shimano BBR60, MT-800 & BBT-59.2 | CNC Aluminum

Fit perfect for my Shimano bottom bracket and functioned perfectly. Great value vs the “blue brand”. Build quality seems good for you’re home mechanic.

Evita daño en las tuercas del BB, excelente herramienta para el mantenimiento de tu bicicleta

Far be it from my to figure out why BB manufacturers can't even pick a spline diameter and pattern for external cup BBs so you need multiple tools for what is essentially the same piece of hardware. But, suffice to say, this fits an Ultegra BBR60 perfectly. Considerably less expensive than the Shimano or Park equivalent and for a tool that you use maybe 3 times (see comment above regarding constant changes to BB specs) that fits the bill. The advantage of a tool with a square bit like this compared to a wrench-style is that you can attach to the torque wrench.

Está muy frágil, se siente de muy mala calidad

Works for me, as intended (when seated snugly onto bottom bracket covers), otherwise you’ll get slippage. Probably best done with tool facing up & frame secured to a wooded vice; if your having difficulty with fastening/removing it from the side/when bike is standing in normal form, on it’s tires.