With the Sperzel Trim-Lok unstable tunings and tedious string changes are a thing of the past. Thanks to the backlocking function, the string is simply pulled up a little tighter and clamped in the adjusting axis. As a result, the string requires fewer windings on the axle and is more stable in tuning.
On the back of the headstock, the Trim-Lok mechanism uses a space-saving pin lock, which means that even tighter arrangements on small headstock plates are no problem.
