Features: Designed for Ukulele, good accessory for ukulele lovers in any grades. Ergonomic design, comfortable feeling, easy to quickly change position between frets by single hand without breaking the tuning. Heavy duty internal metal spring, proper pressure for holding the strings tightly and long-lasting elastic capacity. Silicone pads inside of clip for protect instrument from damage and scratch. Premium zinc alloy main material, ultra lightweight, with lovely and colorful surface.