PAGOW 4mm 5mm Guitar Truss Rod Wrench Ball End Allen Wrench Tool for Martin Acoustic Guitar Truss Rod Adjustment for Deep or Narrow Truss Adjustment Black

Need to change the action of your favorite Martin? Our Allen Wrench will help you adjust your guitar’s neck to achieve the action you desire. Material: Metal Style: 4mm Ball End,5mm Ball End (Option) Size: 12.5*7.5cm/ 5.9*1.77" 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. Specification: Hex Size : 4mm/0.16"; 5mm/0.2" Overall Size : 125 x 75mm / 4.9" x 2.95" Package content: 1 x 4mm Wrench 1 x 5mm Wrench