Unior 1647/2BBI-US Master Chain Tool

Unior 1647/2BBI-US Master Chain Tool is a professional workshop tool for mechanics who regularly service different bicycle drivetrain systems and want one robust solution rather than several basic chain breakers. Its adaptable working platform makes it particularly useful in busy workshops where road, mountain, gravel, singlespeed and newer electronic drivetrain chains may all arrive on the same service bench.

Controlled Pin Removal. The tool is built around smooth spindle movement and substantial leverage, allowing pressure to be applied progressively rather than forcing a chain pin abruptly. This gives the mechanic better control when separating a chain and helps keep the link correctly supported throughout the operation. The design is especially useful when repeatedly working on modern, narrower chains where accurate alignment becomes increasingly important.

Designed for Workshop Life. Interchangeable support pieces allow the working area to be adapted to different chain constructions, while serviceable components extend the useful life of the tool. Unior also provides replacement supports and driving pins separately, making the tool suitable for long-term professional use rather than treating wear components as non-replaceable. Its broad compatibility makes it particularly valuable for mechanics who want to reduce the number of chain-specific tools occupying the workbench.