I bought one of these in July of 2013.  I had a black one that I have owned for over 10 years and works great.  This one, the spring doesn't keep the string down snug enough to prevent buzzing.  A complete waste of money.  I am going to buy one of these in the future...http://smile.amazon.com/G7th-Performance-Capo-String-Silver/dp/B0007GGUGA/ref=sr_1_1?s=musical-instruments&ie=UTF8&qid=1447375034&sr=1-1&keywords=g7%20capo%20for%20acoustic%20guitar