For guitar bass truss rod adjustment, like PRS SE, Jackson-Pro Series (Japan)/Mark Morton 10th Anniversary (USA Post 2016)/Chris Brady Signature Pro (Indonesia), Ibanez-All Electric Guitars (Japan)/All Basses & Acoustic Guitars (Japan Post-2005) Hex wrench inner hole diameter: 7mm(9/32 inch). Total length: 175mm(6-57/64 inch). The hex key is adjustable and removable Made of hardened steel, precise machined, high strength, stable and durable, good wear resistance, resistant to stripping or breaking Non-slip aluminum alloy handle with end caps, comfortable to grip and easy to use. Each handle marked with clear size for easy identification and use, also with set screw for easy length adjustment
