WINGO Pro Guitar Capo for Acoustic Electric Guitars - Chrome Capotraste Professional ----Designed for acoustic and electric guitar,banjos ,ukulele,bass with curved rubber. (not classical) Perfect Tension----Knurled tension knob for precise control of tension No Buzz---- holding capo firmly in place as you adjusted, keeps strings in tune without buzzing. Strong Spring---Lightweight zinc-alloy body with super smooth finish.Strong spring for long time use. Guarantee----100% life time Guarantee,if you are not happy with it,just let us know. Most musician choice on the guitar capo. Best guitar capo fit for acoustic ,electric guitar. Adjustable for perfect tension. Made by Premium-Grade Zinc Alloy. Strong Steel Spring for Super Long-Time Use. Protective Silicone Pads. Color:Silver.