If work on or own a bike you maintain with electronic shifting, the Park Tool EWS-1 Electronic Shift 3-Way Tool offers a simple and effective tool resource for specific tasks required with these hyper specific systems. It's composite body is durable and prevents scratching of expensive components while the various tool extensions are designed to be effective for use in tight spaces.

The EWS-1 offers two Shimano Di2 e-Tube specific wire tools- one used for install, one for removal. The third extension universally safely opens and closes coin cell battery covers commonly used on many bike related electronic items, including SRAM eTap levers and Quarq/SRAM power meters.