The Shubb Original C-Series Steel String Capo is slightly curved and 2" across. This caop fits almost all acoustic steel-string and electric guitars. The Original C-Series steel string capo features a patented locking action that provides an unrivaled combination of power, speed, accuracy and ease of use. One smooth flip of the lever locks it securely in place, and removes it just as quickly. And the Shubb C-Series capo doesn't create tuning problems. Its soft, resilient rubber is specially designed to work just like a fingertip, so the capo doesn't bend the strings over the frets. Its closing action is just like your hand's, so the Shubb Original C-Series Steel String Guitar Capo doesn't pull strings off center. As a result, no retuning is necessary.