4mm and 5mm guitar truss rod wrench with ball end are lengthened, perfect for narrow or deep truss rod likes guitar adjustments. Gauge: 1.5mm, 2.0mm, 2.5mm, 3.0mm, 4.0mm, 5.0mm, 1/20in, 1/8in, 3/16in. Guitar hex wrench set is made of carbon steel, durable and highly wear-resistant. Various gauges suitable for most guitar screw adjustments. For locking hexagonal screws on , adjusting the guitar neck. Pipe wrench 6.35MM (1/4 inch) model is suitable for most folk guitar series, (not suitable for classical guitars of this brand) The pipe wrench 7MM model is suitable for some Korean , , and guitars. Please choose according to the actual size of your piano Pipe wrench 8MM (5/16 inch) model is suitable for some American electric guitars and ESP electric guitars colour:black material:metal Package Contents: 1 x 4mm ball wrench 1 x 5mm ball wrench 9 x wrench kit 3 x pipe wrench Only the above package content, other products are not included. Note: Light reflection 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.