Product Description Kaynes 3L3R Guitar Locking Tuners 1:16 Lock String Sealed Tuning Key Pegs Machine Heads Set. Replacement for EPI/Les Paul/Custom. Gear Ratio - 1:16, designed to fit modern 10mm headstock holes. Fits modern 10mm tuner holes; 2 Pin type, no need mounting screws.(Use with caution for guitars with screw eyes) Quality is Excellent and the finish is flawless, with a smooth, mirror finish on all angles Just slip the String though the hole, tighten the Locking Thumb Wheel, and Tune the String (please note the locking thumb wheel can not be pulled out completely) Please check the dimension photo to confirm whether they can fit your guitar before you order the item. Replacement / Upgrade parts for electric or acoustic guitars or precision instruments. Easy to install, quick and accurate tuning. Durable and highly reliable for easy, smooth, and precise tuning. Made of solid zinc alloy materials with an elegant and professional look. With heavy duty internal gear. Provides finer tuning and greater stability. Made in Korea. Square Button Style Machine Heads Material specification: Zinc Alloy Color: Silver Number of Strings:6 Size:As shown in the picture. Package Includes: 6 x Guitar machine head (3L3R) 6 x Ferrules 6 x Threaded Bushings If you have any questions, feel free to contact us.