It is made of zinc alloy, which is well-made and durable enough to withstand heavy use. Small and light enough to play out of the way, perfect for ukulele players. Not only is it beautifully designed, but it is also very easy to use. You can quickly install and remove the ukulele with just a light tightening with one hand. It has a strong spring steel memory to hold the strings and give the ukulele's frets the desired pressure without humming or flexing the strings. It doesn't fall or slip on the frets. The soft thick silicone pad prevents your precious ukulele from getting scratched or damaged. 100% Satisfaction, 60 Days Money Back Guarantee If for any reason you're not completely satisfied with your new capo, just send us an email and we'll give you a 100% refund unconditionally.