This set of 6 in line Gotoh SGS510Z 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. The 1:18 gear ratio gives a good balance of tuning speed and precision and they have staggered string posts to provide the correct string tension over the nut and eliminate the need for string trees, improving tuning stability, the EAD strings have 20 mm tall posts and then the GBe strings have 18.5 mm posts. 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.