Features:OOTDTYFINE WORKMANSHIP: The guitar tuning keys are made of quality metal material, sturdy and durable, just good quality, claical designs button for you. ACCURATE DESIGNS: The 1:18 ratio tuning pegs are great for guitar tuning, precise engineering enables sure, smooth tuning. With these tuning pegs, you can tune guitar strings fast and accurately. EASY TO INSTALL: Comes with adequate mounting screws and best for easy mounting. The tuned guitar string does not loosen easily. APPLICATION: The Locking tuners prevent the guitar from being exposed to air and reduce the rust, which are more durable. And with the quality internal gear, its effective to prevent screw slippage. PERFECT FOR: Guitar locking tuning machines with heavy-duty internal gear, sturdy and convenient. Easy to install, easy to replace your old or dirty guitar tuning pegs.Specifications: Material: Metal Color: As The Picture Shows Package Weight: approx.156g Size: As The Picture ShowsPackage Includes: 2Pcs x Guitar Machine Heads(3R+3L) 8Pcs x Mount ScrewsNote: Please allow 1-2cm error due to manual measurement. Please make sure you do not mind before you bid. Due to the differences between different monitors, the picture may not reflect the actual color of the item. Thanks!