1、With locking function, the tuner can prevent the gear from being exposed to the air and reduces rust. 2、These guitar string tuning peg enables convenient and accurate guitar strings adjustment, very practical. 3、The tight and firm fixing allow the guitar to maintain the pitch, which adds more enjoyment to guitar playing. 4、Adopting premium alloy material, all the the 6 string tuner heads are not easy to deform, very durable. 5、The universal size is suitable for almost all acoustic guitars and electric guitars. 6 x Locking Guitar String Tuning Peg6 x Screw Item Type: Locking Guitar String Tuning PegColour: GoldMaterial: Small Alloy Handle + A3 Steel Plate + Free-Cutting Iron Pillar + Copper GearHandle Width: Approx. 17.5mm / 0.7in