Package includes: 6 pieces (6 for Right Hand) lock guitar tuners pegs, 6 mounting screws, 6 threaded bushing, and 6 ferrules, good replacement for almost electric or acoustic guitars. Guitar locking tuning machines with heavy duty internal gear, sturdy and convenient. Made of zinc alloy material, durable to use. Easy to install, easy to replace your old and dirty guitar tuning pegs. Locking tuners help to provide finer tuning and greater stability. Specification: Material: Alloy Package Weight: approx.218g Color Optional: Black/Golden/Silver Size: As The Picture Shows Package Includes: 6 x Guitar Machine Head (6R, 6L or 3R3L) 6 x Ferrules 6 x Threaded Bushings 6 x Mount Screws note: Please allow 1-3mm error due to manual measurement. pls make sure you do not mind before you bid.