Lock chord back cover is made of metalAfter the version upgrade, the lock chord back cover is made of metal, which is not easy to break and damage, and has better stabilit.Good locking tuner pegs can ensure you to play your beloved guitar flexibly and accurately. Guyker locksguitar pegheads fit for LP, SG, EPI, Tele style electric or acoustic guitars. Featured with sealed machineheads and heavy-duty internal gear, it can turn smoothly, enabling the player to tune accurately and easily. product good replacement for almost electric or acoustic guitars.Guitar sealed tuning machines with heavy duty internal gear, sturdy and convenient.Easy to install, easy to replace your old and dirty guitar tuning pegs.Guyker locking tuners help to provide finer tuning and greater stability.Gear Ratio - 1:18, designed to fit modern 10mm headstock holes. Gold plated. Made in Korea. Feature: - 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 materials with an elegant and professional look. - With heavy duty internal gear. - Provides finer tuning and greater stability. - Quality sealed guitar machine heads. - Made in Korea. Specifications: - 3 Combinations Available: 6R, 6L or 3R3L- Style: Hexagonal Handle GK-501D7CSP- 3 Colors Available: Golden, Black, Chrome. Package Includes: - 6 x Guitar machine head (6R, 6L or 3R3L for choose) - 6 x Ferrules - 6 x Threaded Bushings