Locking Tuners 3x3 Full Size Locking Guitar Tuners - Stable Tuning

In this review the reviewer looks at the Dopro Locking Tuners 3x3 full size set and finds them best for players who need a compact, reliable upgrade to hold tuning under heavy play. The single biggest reason to buy is the built-in locking mechanism paired with a 191 tuning ratio, which together make string changes faster and tuning more stable than standard open-gear machines. These tuners are presented as a straightforward replacement for many Gibson Les Paul and acoustic headstocks that use a straight screw fixing tag.

Key Features

• Locking mechanism: The built-in locking posts make restringing quicker and keep strings from slipping, improving tuning stability during gigs or heavy bending.
• Compatibility: Designed for most 3x3 headstocks with modern 25/64' (10mm) tuner holes and straight screw fixing tags, so installation is simple on compatible guitars.
• 191 tuning ratio: The 191:1 ratio provides smooth, precise adjustments that help fine tune quickly without overshooting the note.
• Full hardware kit: The set includes six tuners plus screws, bushings and washers so the replacement job can be completed without sourcing extra parts.
• Sealed housings and classic buttons: Full size sealed tuners with classical kidney bean buttons deliver a familiar feel and protect internal gears for longer life.

Who It's For

These locking tuners suit electric guitarists who own Les Paul style instruments and many acoustic players who have 3x3 headstocks with straight screw fixing tags. Players who restring frequently or perform live will appreciate the speed of the locking posts and the steady tuning under string bend stress.

They are not appropriate for headstocks that use a 45 degree fixing tag; buyers should verify their existing tuner tag orientation and the modern 25/64' (10mm) hole size before ordering. Those with vintage or nonstandard peg spacing should look for model-specific replacements instead.

Pros & Cons

Pros

• Locking posts significantly reduce string slippage and make restringing fast and repeatable.
• Included screws, bushings and washers make for a complete installation without extra parts.
• Sealed housings and classical kidney bean buttons offer reliable, familiar operation and protection for the gears.

Cons

• Will not fit headstocks with a 45 degree fixing tag, so measurements and tag orientation must be checked before purchase.

Specifications

Brand	Dopro
Configuration	3x3 full size set (6 tuners)
Hole size	25/64' (10mm)
Fixing tag	Straight screw fixing tag (not 45 degree)
Tuning ratio	191
Buttons	Classical kidney bean buttons
Included hardware	Screws, bushings and washers

Our Verdict

For Les Paul and many acoustic owners with modern 25/64' tuner holes and straight fixing tags, these Dopro locking tuners are a cost-effective upgrade that improves tuning stability and speeds up string changes. They deliver solid build quality and accurate tuning for players who need dependable machine heads without changing peg spacing or routing.

Frequently Asked Questions

Will these fit my Les Paul?
They fit many Les Paul models that use a 3x3 headstock with 25/64' (10mm) holes and a straight screw fixing tag; verify tag angle before buying.

Are mounting screws and bushings included?
Yes, the full set ships with screws, bushings and washers required for installation.

Do they improve tuning stability?
Yes, customers report improved tuning accuracy thanks to the locking posts and 191 tuning ratio.