6+6 Guitar Tuning Keys Pegs Open Tuners Zinc Alloy Machine Heads for 12 string Guitar Features: Made of qualified zinc alloy, sturdy and durable, ensure a long time use. The tuned guitar string does not loosen easily. With these tuning pegs, you can tune guitar strings fast and accurately. internal gear, it's effective to prevent screw slippage. These tuning pegs are compatible with 12 string guitars. Ideal to replace your old and dirty tuning pegs and great for guitar tuning. Specifications: Condition: Material: Zinc Alloy+Copper Weight: Approx. 239g / 8.4oz Size(L * W): Approx. 16 * 3.8cm / 6.3 * 1.5in Tuning Peg Spacing: Approx. 2.5cm / 1.0in Column Diameter: Approx. 0.7cm / 0.3in Sleeve Diameter: Approx. 0.8cm / (Installation Place), 1.1cm / 0.4in(Max.)   Package list:  2 * Tuning Peg Set(Each set includes 6 tuning pegs) 14 * Screw 12 * Sleeve