The D'Addario Pro Capo is designed specifically for use on classical guitars. A patented micrometer adjustment mechanism allows the player to dial in the exact tension needed for clear ringing notes without excessive force in any position on the neck. This greatly reduces the need to retune your guitar during and after capo use and helps deliver exceptional intonation. The sleek construction can withstand the toughest playing/touring schedule while adding negligible additional weight or obstruction to the instrument.