The best replacement for locking tuners is locking nut.

The best alternatives to locking tuners are rated as following:
★★★★★  locking nut
★★★★  vintage tuners
★★★★  non locking
★★★  floyd rose
★★  schaller
★  sperzel
★  standard tuners
★  non locking tuners

Your alternative for locking tuners is not listed? Suggest!
Speaking about locking tuners, one probably shouldn't forget about bigsby.

Other search terms related to locking tuners and their ratings are:
★★★★★ bigsby
★★★★★ floyd rose
You have in mind a companion for locking tuners and it is not yet here? Propose!



Google Trends

Scale is based on the average worldwide traffic of locking tuners in all years. Click on graph for more.
locking tuners
locking nut
vintage tuners