PRODUCT DESCRIPTION These tuners feature a thumbwheel locking function to keep your strings securely in place. This prevents string slippage and also enables you to cut off your excess string. You don't have to wrap the string around the posts several times like you do with an non locking machine tuner. Simply thread the string though the hole in the peg, then twist the thumbwheel to secure it in place. Simple and effective, and speeds up re-stringing. The new sleek design and smooth 1:18 gear ratio give you a great combination of tuning stability, accuracy and good looks. These tuners have a sealed housing & mounting screw hole at 45 degrees. With heavy duty internal gear, sturdy and convenient. The guitar will not off key if you lock the screw post when tune the guitar properly. Easy to install, great replacement for your old or dirty guitar tuning pegs. SPECIFICATION Quality sealed locking guitar tuner set Twist-locking thumbwheel function Material: Zinc alloy Colour: Gold Precise 1:18 ratio. Requires 3/8(10mm) peg head holes Location: 6 right For most modern peg head applications 100 Percent brand new, high quality construction PACKAGE INCLUDE 6 x Guitar locking tuners (6 in line for right handed)6 x Ferrule6 x Threaded bushing6 x ScrewIMPORTANY NOTE Kindly check your instrument if this item is suitable for according to the item specifictions before you place the order. Thank you!