This is the CruzTOOLS Stagehand Compact Tech Kit for bassists and guitarists. The Stagehand kit centres around a screwdriver-style bit holder and a 19-piece magnetic bit set that comprises screwdrivers, and imperial and metric size allen keys and sockets.

Basically all you need for most bridge, truss rod, tremolo, and nut adjustments on nearly all makes and models of guitars.

The Stagehand set also includes a capo and 15-blade thickness gauge with integrated ruler, a string winder, and a smaller version of the GrooveTech string cutters. It all come in a zip-up pouch measuring 7″x2″x2″ for easy storage in a gig bag.