This set of 3 x 3 Gotoh SGL510 locking tuners are part of their flagship 510 range, high quality and built to last. Gotoh's Magnum Locking system is operated by a traditional thumb screw on the back of the tuner for quick and easy string changes and the 1:18 gear ratio gives a good balance of tuning speed and precision. The 'Rock-Solid' string post improves the tuning stability of the tuner and stays strong during bending and tremolo use, special elastic parts eliminate any rattle in the post and transmission of string vibration to the instrument is maximised. The tuners are completely sealed and permanently lubricated through Gotoh's 'Lubri-Plate' technology, a Teflon coating applied to both parts of the worm gear ensures smooth gear meshing and increased durability. The 3 x 3 set has the screw attachment holes offset at a 45 degree angle to the tuner post, this set up is common on a lot of 3 x 3 headstock designs from Ibanez, Schecter, ESP, Jackson and PRS SE guitars.