4mm Size Ball End Guitar Truss Rod Wrench Adjustment Long Wrench Guitar Tool for Acoustic Guitar

Model Number:Guitar Truss Rod Wrench
Type:Guitar Truss Rod Wrench
Style: :4mm Ball End
Material:Metal
Metal Size: 12.4x7.4cm (LxW)
Package Include: 1 x Wrench
Features: 1. For Martin and most acoustic guitars
2. Two-way L-shaped frame rod adjustment
3. The professional neck wrench is in the relatively deep guitar neck adjustment hole.
4. Adjust the neck of the straight guitar for Martin guitar. No matter which type, the piano body will be normal.