Hosco open jack wrench

Here’s a revolutionary tool to solve the long standing loosened output jack issue many guitarists have been annoyed by: the Hosco Japan open jack wrench for tightening guitar output jack, 1/2 inch (USA) hex nuts. This wrench is able to secure the open jack and retighten the hex nut. It was originally designed for ½-inch nut but also fits import/mm-size nuts.

While the shaft in the centre stabilises the jack the hex wrench cylinder can be used to turn the nut. This precise durable Japan-made tool is a must-have item for dealers, repair staff and guitar techs as well.

How to use: insert the shaft end of the H-OJW into the open jack, making sure the tip rests on the open jack. Next, set the outer cylinder onto the hex nut. To prevent the shaft from moving, turn the cylinder and tighten the nut while securing it with the handle portion.