The Music Nomad MN228 Octopus tool for guitar and bass is only 15cm long and should not be missing in any gig bag or guitar case. The Octopus 17 ́n 1 Tech Tool is made from strong nylon material.Five hexagonal openings in the sizes 10mm, 12mm, 14mm, 1/2" and 7/16" are located on its underside. This allows you to loosen and tighten potentiometer and switch nuts, mechanical nuts and output sockets. By removing the adapter from the top of the tool, the thin-walled 1/2" hex nut can also be used for narrow socket plates or countersunk pole nuts. The adapter itself is an additional 1/4" hex wrench.