Handy pocket-size wrench.

Quickly fixes loose jacks, pots, switches and tuners.
 
Store this versatile little steel wrench in your guitar case and you can quickly fix a loose output jack, control pot, pickup switch or tuning machine. Turn adjustable bridge thumbwheels more easily, too. One end of the Multi Spanner is toothed for loosening a nut; the other end tightens it. A mere .075" (1.90mm) thin, the tool can fit under a control knob and is specially angled for clearance over a guitar body or peghead.
 
This is an original ESP luthier designed tool. Sure there are lots of other imitation ones especially from China, but nothing beats the original ESP one which is finer and made from premium material.

Thank you.