GOTOH Magnum Lock is a self locking system by string tension and is a great asset when keeping vibrato-equipped guitars in tune without any string breaking and slipping off. Tuning stability of new Magnum Lock is taken to a next higher level with the introduction of new smaller string holes on 1st, 2nd and 3rd string posts.

MG and H.A.P.M. of SG510/SD510 series evolve with new double-speed locking.

Keeping current appearance and function, it is able to speed up to double for locking by using double threaded screw on locking top.
* Double-speed locking on MG and H.A.P.M of SG510/SD510 series becomes standard specification.

Combining the ability of Post Height Adjustable and Magnum Lock. Keeping the current function, locking stability has been improved with the introduction of new smaller string holes on 1st, 2nd and 3rd string posts. Locking feature gives a machine head that is the perfect choice for flat peg-head guitars equipped with Vibrato. Removing the string tree on this type of guitar is essential for tuning stability to keep in tune when in playing as it makes ultimate string tension by staggered string posts function.