guitar and bass tool for your pocket:

• 7 hex keys
• 3 screwdrivers,
• a ruler for setting action
• pocket size: 8cm

Pocket size ruler to measure out string action and setup standards
Etched version for professional use
Scale with 1 / 4mm  gradation ranging from 0.25 to 3.5
0-20mm ruler on both sides
0-75mm ruler
Back: Conversion table millimeters to inches with fractions
Material: stainless steel, 0.3mm
Size: app. 90 x 50mm

Special hex key for 5/16" (7,94 mm) truss rod nuts
e.g. Gibson