Usage Tips:Features: 1.The locking tuner can prevent the gear from being exposed to the air and reduces rust, making it more durable. 2.Using these tuning pins, you can conveniently and accurately adjust the guitar strings with great ease. 3.These tuning pins can tightly fix the strings, allowing the guitar to maintain the pitch for more playing pleasure. 4.Premium alloy material with screws, very simple to install and remove, and the firm fixing is not easy to loose. 5.Including 6 string tuner head, and suits for most acoustic guitars and electric guitars, very practical. specification:Item Type: Locking Guitar String Tuning Peg Colour: Silver Material: Small Alloy Handle + A3 Steel Plate + Free-Cutting Iron Pillar + Copper Gear Handle Width: Approx. 17.5mm / 0.7in PackageList: 6 x Locking Guitar String Tuning Peg 6 x Screw