7MM/8MM/6.35MM Guitar Truss Rod Wrench Guitar Adjustment Tool with Screwdriver for Guitar Instrument The truss rod wrench is made of quality metal Long handle length allows easier access to truss rod cavity Fits most (Not All) Gibson guitars as well as other guitars requiring a wrench Features nut driver on one end and a handy Phillips screwdriver at the other Used for adjusting the amount of relief in the neck, suitable for electric guitar replacement parts The 6.35MM (1/4 inch) model is suitable for most Taylor acoustic guitar series (not applicable to the brand's classical guitars) (please pay attention to the size data of the long and short models; if you buy the long model, the length may prevent insertion into the hole due to interference with the wood; choosing the wrong length may result in insufficient reach to screw into position) The 7MM model is suitable for some Korean PRS, Jackson, Taylor, and Ibanez guitars. Please choose according to the actual size of your instrument (please pay attention to the length and short size data) The 8MM (5/16 inch) model is suitable for some American-made Gibson electric guitars and ESP electric guitars. Please choose according to the actual size of your instrument (please pay attention to the length and short size data) Color: Black / Silver Material: Iron Size: 7MM/8MM/6.35MM Package Contents: 3 x Guitar Truss Rod Wrench Only the above package content, other products are not included Note: Light shooting and different displays may cause the color of the item in the picture to be slightly different from the real thing. The measurement allowed error is +/- 1-3cm