Multi Spanner MS-10 | Multi-Purpose Wrench

The ESP Multi Spanner was born on the job: live shows, studio sessions, backstage. The situation is straightforward. A loose jack or pot nut causes signal dropout or unwanted noise. A loose tuner nut and you can't hold pitch. These are problems you always notice at the wrong moment, right before you play. ESP designed a single tool to fix all of them. The Multi Spanner is a double-ended wrench. Each side has a dedicated function: one end tightens, the other loosens. This separation improves handling and extends the tool's lifespan by reducing wear from alternating use. It covers virtually every nut found on a guitar or bass: sizes 8 to 18 mm (across flats) and knurled nuts. Jack, pots, tuners, one tool does it all. It lives in your case or gigbag and takes up no space. When something goes wrong on stage or mid-session, you identify the nut and tighten it in seconds without digging through a full toolkit. Useful for preventive maintenance too: checking tuner, jack and pot tightness before a show or session prevents most common hardware issues. The Multi Spanner MS-10 is a minimal but highly effective maintenance tool that covers 90% of your toolkit needs in a single piece.