The Park Tool EWS-1 Electronic Shift Tool simplifies the installation and removal of electronic shifting wires and batteries. A durable composite body shaped in the iconic three-way wrench style prevents scratches on valuable components. Angled ends provide safe access to Shimano Di2 E-Tube wires, even in confined spaces. A universal coin cell tool allows for quick removal and installation of battery covers on SRAM AXS and other electronic accessories. Reliable and easy to use, the Park Tool EWS-1 Electronic Shift Tool ensures a hassle-free process for maintaining electronic drivetrains.Features:- Compatible with Shimano Di2 E-Tube EW-SD50 wires (nominally 5 mm OD connector)- Not compatible with Shimano Di2 E-tube EW-SD300 wires (nominally 3 mm OD connector)

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