For guitar bass bridge saddles or knobs adjustment, also can be used for general purpose 1/20 inch(1.27mm) hex screwdriver. Total length: 175mm(6-57/64 inch). The hex key is adjustable and removable Made of high speed 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
