The Kyser Quick-Change for classical guitars does not have a radius and is specifically manufactured with just the right amount of tension for classical strings. This Kyser Quick-Change is expertly engineered and built to last. It isreliable and does just what it is designed to do clearly raise the pitch ofthe classical guitar so you can play in a different key without retuning or changingfingering. Seasoned professionals and beginning players alike appreciatehow the Kyser Quick-Change helps them transpose their classical guitar inseconds, with only one hand. The beauty of the Kyser Quick-Change isin its simplicity. We pioneered this design and although often imitated,a Kyser is never equaled. There is no substitute for a Kyser Quick-Change.