The locking version of Gotoh's SG381, using their Magnum Lock-Trad system, a rear thumbscrew that clamps the string in place.
26 guitars checked: 15 likely drop-in, 11 needs verification.
Where to buy
Amazon
Being re-verified
Tuner hole size
10mm
ConfirmedGear ratio
16:1
ConfirmedMounting pattern
Single mounting screw per tuner, offset 45° from the post on 3-per-side headstocks. Same physical mount as Gotoh's non-locking SG381, the Magnum Lock mechanism is internal.
26 guitars checked: 15 likely drop-in, 11 needs verification.
Gotoh specify a 10mm bore for these, matching this guitar's holes. A straight locking upgrade, no reaming.
The Epiphone ES-335 has a Gibson-style 3-per-side headstock drilled at 10mm, and Gotoh specify a 10mm bore for the SG381 housing, so the posts seat in the existing holes.
Should swap straight into the existing tuner holes, no reaming needed. This tuner set is not handed, so the same part works on this left-handed guitar.
Standard 3+3 footprint. Gibson/PRS 3-per-side tuner sets are not handedness-specific.
Gotoh specify a 10mm bore for these, matching this guitar's holes. A straight locking upgrade, no reaming.
The Epiphone Les Paul Custom ships with Grover Rotomatic tuners on a 3-per-side headstock drilled at 10mm, and Gotoh specify a 10mm bore for the SG381 housing, so the posts seat in the existing holes.
Gotoh specify a 10mm bore for these, matching this guitar's holes. A straight locking upgrade, no reaming.
Current-production Epiphone Les Paul Standard 50s tuner holes are widely reported at 10mm, and Gotoh specify a 10mm bore for the SG381 housing, so the posts seat in the existing holes.
Gotoh specify a 10mm bore for these, matching this guitar's holes. A straight locking upgrade, no reaming.
A detailed measurement source puts this guitar's tuner holes at 10mm, and Gotoh specify a 10mm bore for the SG381 housing, so the posts seat in the existing holes.
Should swap straight into the existing tuner holes, no reaming needed.
Standard Gibson-style set-neck single-cut with Grover tuners on a 10mm hole.
Gotoh specify a 10mm bore for these, matching this guitar's holes. A straight locking upgrade, no reaming.
The ES-339 uses the same headstock hardware as the ES-335, drilled at 10mm, and Gotoh specify a 10mm bore for the SG381 housing, so the posts seat in the existing holes.
Should swap straight into the existing tuner holes, no reaming needed.
Gibson's own spec sheet confirms Grover tuners on the standard 3+3 footprint.
Should swap straight into the existing tuner holes, no reaming needed.
Standard Gibson 3+3 footprint, 10mm holes.
Should swap straight into the existing tuner holes, no reaming needed.
Ships with locking Grover Rotomatic tuners on the standard Gibson 3+3 footprint.
Should swap straight into the existing tuner holes, no reaming needed. This tuner set is not handed, so the same part works on this left-handed guitar.
Same footprint as the right-handed Les Paul Standard 60s. Not handedness-specific.
Should swap straight into the existing tuner holes, no reaming needed.
Standard Gibson 3+3 footprint, 10mm holes.
Should swap straight into the existing tuner holes, no reaming needed.
Standard Gibson 3+3 footprint, 10mm holes. Open discrepancy is about bridge post spacing, not tuners.
Should swap straight into the existing tuner holes, no reaming needed.
Standard Gibson 3+3 footprint, 10mm holes. Open question is which tailpiece is fitted, not the tuners.
Should swap straight into the existing tuner holes, no reaming needed. This tuner set is not handed, so the same part works on this left-handed guitar.
Standard Gibson 3+3 footprint. Not handedness-specific.
The tuner hole size matches, but this guitar's screw mounting pattern is angled differently from a standard mount.
Hipshot's own fitment guidance for the ESP LTD Eclipse states tuner mounting screw holes are angled 45 degrees from the tuner body, a nonstandard pattern.
Help confirm this fit
The tuner hole size matches, but this guitar's screw mounting pattern is angled differently from a standard mount.
Hipshot's own fitment guidance for the ESP LTD Eclipse states tuner mounting screw holes are angled 45 degrees from the tuner body, a nonstandard pattern.
Help confirm this fit
The tuner hole size matches, but this guitar's screw mounting pattern is angled differently from a standard mount.
Shares the same Eclipse-body headstock, nonstandard 45-degree angled screw mount per Hipshot's fitment guidance.
Help confirm this fit
The tuner hole size matches, but this guitar's screw mounting pattern is angled differently from a standard mount.
Hipshot's own fitment guidance for the ESP LTD Eclipse states tuner mounting screw holes are angled 45 degrees from the tuner body, a nonstandard pattern.
Help confirm this fit
The tuner hole size matches, but this guitar's screw mounting pattern is angled differently from a standard mount.
Hipshot's own fitment guidance for the ESP LTD Eclipse states tuner mounting screw holes are angled 45 degrees from the tuner body, a nonstandard pattern.
Help confirm this fit
The tuner hole size matches, but this guitar's screw mounting pattern is angled differently from a standard mount.
Shares the same Eclipse-body headstock, nonstandard 45-degree angled screw mount per Hipshot's fitment guidance.
Help confirm this fit
The tuner hole size matches, but this guitar's screw mounting pattern is angled differently from a standard mount.
Shares the same Eclipse-body headstock, nonstandard 45-degree angled screw mount per Hipshot's fitment guidance.
Help confirm this fit
The tuner hole size matches, but this guitar's screw mounting pattern is angled differently from a standard mount.
Shares the same Eclipse-body headstock, nonstandard 45-degree angled screw mount per Hipshot's fitment guidance.
Help confirm this fit
The tuner hole size matches, but this guitar's screw mounting pattern is angled differently from a standard mount.
LTD EC series shares the same Eclipse-body headstock design, nonstandard angled screw mount.
Help confirm this fit
Hole size should be close, but tuners on this model have varied by year. Confirm your actual tuner post diameter before ordering.
Tuners vary by production year between Vintage Deluxe, Grover, and Kluson on roughly 10mm posts.
Help confirm this fit
Hole size should be close, but Gretsch tuner mounting patterns vary by model and this one has not been confirmed.
Gretsch tuner mounting conventions vary by model and this has not been confirmed for the G6120T specifically.
Help confirm this fit
If you have fitted any of these to this Gotoh SG381 Locking Tuners (Magnum Lock-Trad), 3+3, tell us what you found and we'll update the data.
