Feature:1. [METAL MATERIAL] Our guitar tuning knobs are made of rust resistant, wear resistant metal that is durable enough to last a long time.2. [FAST TUNING] This guitar tuner is suitable for 12 string guitars, which can make your guitar strings not easy to loosen, and adjust the guitar strings quickly and accurately.3. [EASY INSTALLATION] Lightweight and compact, this guitar tuner is easy to install and remove for your convenience.4. [PERFECT GIFT] Are you still worried that the gifts you give are useless? If you give this guitar tuner to your guitar loving friends, I'm sure they will rave about the gift.5. [COMPLETE ACCESSORIES] In addition to the 2PCS guitar tuner, there are also 12PCS sockets and 15PCS screws in the kit, which can perfectly meet the installation needs.Specification:Item Type: Guitar tuning keyMaterial: Metal.Package List:2 x Guitar Tuning Key15 x Screw12 x Socket