Features: Adopting an open triple knob design, the knob operation is more convenient, with a fashionable appearance, adding a sense of fashion and personalization to the guitar. The knob has precise tuning function, which can help the performer accurately adjust the pitches of the guitar strings and provide a timbre experience. Made of good Copper material, it is durable and stable, and is not easy to loosen or damage after long-term use. Adopting a lightweight design, easy to install and disassemble, easy to carry and replace guitar strings. Comfortable feel, smooth rotation, and precise adjustment of guitar string tightness. Perfect for guitar players of all levels, including professionals and learners. Improve your playing experience with these stylish and functional tuning keys. Specifications: Material: Copper Size: As Shown In The Picture Package Includes: 2pcs/set Guitar Tuning Keys note: Please allow 1-2cm errors due to manual measurement, make sure that you do not mind before you order. Due to the difference between different monitors, the picture may not reflect the actual color of the item.