Features:
For Martin and Most Acoustic Guitar
Two way L-shape truss rod adjustment
Neck wrench specialized to the adjusting hole of the guitar neck relatively deep
Adjust the guitar neck straight,suitable for Martin guitar, regardless of the types, the piano body shall be general

Specifications:
Item Name: Allen Wrench
Material: Metal
Color: Black
Size:
1.5mm electric guitar single shake, small double-shake, electric guitar electric bass fixed bridge piano tuning screw

commonly used this specification(not all)

2.0mm Commonly used for small hexagonal screws of volume knob

2.5mm For hexagonal screws for fixing the chord code of the double-swing bridge

3.0mm Commonly used for double-swing string lock, double-chord bridge string chord length string screws

4.0mm Generally used for neck adjustment

5.0mm Generally used for neck adjustment

Package Content:
6 X Guitar Truss Rod Wrenches