This set of 6 in line right handed official Fender Vintage Style Locking Tuners are in the traditional Kluson design used on vintage Fender guitars and are used on their re-issue guitars. The tuners have locking caps on the tuner posts, simply thread the string through the tuner post hole and begin winding, the locking cap will automatically engage at the correct tension locking the string in place, you can then bring the string up to tension as normal (to release simply detune the string until the cap releases, or if the string is broken insert a coin in the locking cap slot and release it from the string). The press fit bushing fits a 9.2 mm hold in the headstock to secure the string post.