Capos by Ernie Ball. Details: The Ernie Ball Axis Capo’s ergonomic features allow for fast and accurate single-handed key changes.Featuring an innovative dual-radius design, this guitar capo fits most every electric and acoustic model in your collection, whether you play six or seven-string, with either a flat or curved fretboard. Wherever your inspiration takes you, only the Axis Capo gives optimal clamping pressure for crisp on-pitch tone, all the way up the neck. Take the Axis guitar capo on the road and trust precision-molded rubber pads to protect your guitar finish. On the stage or in your writing space, it has to be the Axis Capo. The Ernie Ball Axis Capo’s ergonomic features allow for fast and accurate single-handed key changes. A dual-radius design conforms to flat or curved fretboards, ensuring buzz-free operation on 6 or 7 string electric and acoustic guitars. Precision-molded rubber pads safeguard instrument finish. Made from robust, lightweight aluminum.