This special open-end steel wrench is only .075" slim. It's designed to easily access the thin 1/2" mounting nut on an acoustic guitar endpin jack, without marring the nut. The other end accesses a 14mm mounting nut on a flush-mount output jack, as found on many solidbody guitars.
Because it's thin, the wrench helps avoid damage to the nut, the control cavity wall, and the often crowded circuitry nearby. It's the right tool for the job, and helps make output jack installation faster and easier.
This product is made exclusively for Stewart-MacDonald by