*The silicone rubber lining that covers the entire gripper jaw protects your guitar from scratches or damage. *With the built-in spring; our capo clamps the jaw around the guitar neck; applying the perfect pressure for a buzz-free performance. The strings are kept tight; and there's no more fret buzz without a high-performance capo. *Moving and removing the capo is easy. Simply squeeze the trigger with your hand to release the tension; move it to the desired position; and release it. *The 5 Core capo is one of the best guitar accessories you can own. It works with acoustic and electric guitars; banjos; mandolins; and ukuleles; making it a perfect accessory for any musician.