1、Exquisite workmanship, guitar string cap is suitable for your acoustic guitar and electric guitar tuning knobs. 2、Small tools that guitarists like, which can be used as gifts to make itself getting great popularity. 3、Made of high‑grade plastic, guitar tuner machine head is wear‑resistant and durable with long‑term use. 4、Works as one kind of tuning knob for stringed instruments such as guitar, ukulele and bass. 5、No extral step is required when you use such guitar string cap and the operation is simple. 6 x Guitar String Cap6 x White Washer6 x Black Washer6 x Screw Item Type: Guitar string capColor: White Pearl / Brown (Optional)Material: PlasticAppearance Size: Large Semicircle Handle Width: Approx. 24mm / 0.9inMounting Hole Size: (L x W) approx. 3.8 x 4mm / 0.1 x 0.2in. Not a regular shape