Magma Universal Capo for Acoustic, Electric and Classical Guitars, Fits Flat and Curved Fretboards Silver (MC-06):
Quick Release : super easy to clip on guitar and quick to change. It can even change keys during a song,just clamp it and let your song fly.
No Buzz :perfectly balanced pressure for that clear tone with strong spring.
Well Made:much thicker silicone pad protect your guitars from scratches or demage. 
Highest quality metal material, Delicate shape and extraordinary feel in the hand.
Universal Capo for All Guitars. The ability to flip over and use either axis making it fit both flat and curved fret boards. This dual-radius design ensures just right pressure on 4 strings, and 6 or 7-string electric, acoustic and classical guitars, and it also has the width and strength to handle a 12-strings guitar.