Feature: This set includes 6pcs guitar wrenches, 6pcs screws, 6pcs washers and 6pcs nut screws. Made of high-quality metallic material, durable, rust-proof, sturdy and has a long service life. Replace the old and dirty tuning pins and they're great for tuning your guitar. Excellent workmanship, appearance and gorgeous color. Easy and convenient to install and use. Suitable for guitar lovers. Suitable for musical instruments: acoustic guitar, electric guitar and folk guitar. Specifications:Item Type: Guitar KeysMaterial: Zinc Alloy Size: 28mm / 1.1in (As Shown)Color: Silver, Black (Optional)Suitable: For Acoustic Guitar/Electric GuitarQuantity: 1 SetNote: No retail package. Transition: 1cm=10mm=0.39 inchPlease allow 0-1cm error due to manual measurement. Pls make sure you don't mind before you bid. Due to the difference between different monitors, the picture may not reflect the actual color of the item. Package Included:6 x Guitar Keys (3L+3R)6 x Screws6 x Nut Screws6 x Washers