Truss rod hexagonal wrench set for most kinds of acoustic guitar, electric guitar and .It helps you adjusting guitar parts efficiently.15mm, 20mm, 25mm, 30mm, 40mm, 50mm, can be used for locking hexagonal screws on the bridge, or for the guitar neck adjustment.1/20in for parts of Japan made single roll bridge, 1/8in, 3/16in for parts of America made guitar neck adjustment.Made of metal, durable and great wear-.The guitar hexagonal wrench set with 9 kinds of gauge, widely used for adjusting the truss rod, guitar neck and hexagonal screws on bridge, it makes your guitar more comfortable to play.Material: metalColor: As Shown Gauge: 15mm, 20mm, 25mm, 30mm, 40mm, 50mm, 1/20 inch, 1/8 inch, 3/16 inchItem Weight: 54g / 19ozNote: The guitar not included.Package List: 1 x 9pcs Wrench SetOnly the above package content, other products are not included.Note: Light and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.