Multi Spanner Wrench. Tightening and making adjustments to your gear just got a whole lot easier with MusicNomad’s premium multi Spanner Wrench. Featuring high quality 100% stainless steel combined with precision cut teeth ensures a tight grip on those unique elements of your gear like toggle switches and adjustable bridge thumbwheels. Our low 1.2mm profile lets you get under raised volume control knobs and strings to tighten hard to reach nuts. A soft microfiber suede backing keeps your finish scratch free during use. Compact in size for your pocket and case, big on results for the stage and studio.