U.S. buyers may incur an import tariff of up to 145% on this product due to its country of origin (China)
or for Korean products
U.S. buyers may incur an import tariff of up to 35% on this product due to its country of origin (Korea)
Ratio Tune-a-Lele Ukulele Tuners 6:1 with Large Buttons (4 pcs)
Ratio Tune-a-Lele Ukulele Tuners 6:1 with Large Buttons (4 pcs)
4.9 / 5.0 Based on 316 reviews
PRU-5004-BK
702725242382
Couldn't load pickup availability
RATIOĀ® patented gear technology
RATIOĀ® - Calibrated Machine Heads incorporate different string gauges into the tuning equation.
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Tune-a-Lele Ukulele tuners areĀ the world's lightest machine heads, with a uke friendly 6:1 gear ratio!
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ThisĀ super light, yet strongĀ machine headĀ makes ukes balanced, not headstock heavy, and withĀ zero backlashĀ makes tuning so much easier.Ā
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The PRU-5004Ā is a set of RATIOĀ® Machine Heads for ukuleles that use 4 tuners.
This set has larger buttons than theĀ PRU-4004-BK version.
These ukulele machine heads are a perfect fit for all types of ukuleles except the Soprano type.
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Gear ratio: 6:1
Peg holes diameter required: 0.236" (6mm)
String post diameter: 0.232" (5.9mm)
Bushings diameter: 0.344" (8.75mm)
String post length to string hole: 0.732ā (18.6mm)
Weight per single machine head: 0.015lbs (7g)
Weight per set of six: 0.066lbs (30g)
String diameter up to 50 gauge (up to 1.3mm diameter)
Includes 4 machine heads, mounting screws and bushings







- JLjason l.Verified BuyerReviewing6-In-Line Ratio Electric Locking Machine Heads Staggered Posts (PRL-9721, 9731, Select Finish and Button Style)I recommend this productRated 5 out of 5 stars4 days agoratio tuners
this is a game changer..best tuners I've used
Was this helpful?Graph Tech Guitar Labs Ltd.2 days agoThanks Jason, what guitar did you put them on? Dave D
- MRMatt R.Verified BuyerReviewing3+3 Ratio Electric Locking Machine Heads (PRL-8311, 8322, 8331, 8341, 8351)I recommend this productRated 5 out of 5 stars1 week agoGreat solution for my new PRS SE NF3
I purchased a PRS SE NF3 a couple weeks ago. It is a great guitar, but wanted a locking tuner upgrade. I was originally nervous about the price combined with the "universal fit" thing. I took a chance and ordered these and they have been awesome. The universal plates fit great, although I did have to put in the plates for 3 and 4 together as they are butted up to one another. I was able to use the same screws, but new ones were also provided. I am attaching a photo.
Regarding the "Ratio" feature, it is a game changer. I never expected it to feel different, more accurate, from other tuning heads. But these being geared to each string's thickness/tension is really effective.
If you're on the fence, I hope this helps. This is a unique product with features I would love to see become more standard from premium guitar companies. I am not considering upgrading my Telecaster to Ratio tuners.
Was this helpful?Graph Tech Guitar Labs Ltd.2 days agoThanks for the great review Matt. Some models by ESP (Bass), Schecter, Maton, Martin, and the Godin Connaisseur Acoustics are coming with RATIO... it's great to see. (and play!
- MTMark T.Verified BuyerReviewing4+2 Ratio Electric Locking Machine Heads Mini Contemporary Button (PRL-8421, Select Finish)I recommend this productRated 5 out of 5 stars1 week agoWorth the $$$
Iām glad I threw frugality to the wind and bought these tuners. They really are a worthwhile upgrade. EBMM guitars are very stable tuning wise, but the Ratio heads make getting there so much easier!
Was this helpful?Graph Tech Guitar Labs Ltd.2 days agoWell said Mark! Dave D
- ADAnthony D.Verified BuyerReviewing6-In-Line Ratio Electric Locking Machine Heads (PRL-8721, 8731, Select Finish and Button Style)I recommend this productRated 5 out of 5 stars1 week agoGreat addition
This was an easy swap to upgrade to locking tuners. Excellent quality and tuning stability seems rock solid so far.
Was this helpful?Graph Tech Guitar Labs Ltd.2 days agoThanks Anthony! What guitar did you put them on?
- SRScott R.Verified BuyerReviewing3+3 Ratio Electric Locking Machine Heads (PRL-8311, 8322, 8331, 8341, 8351)I recommend this productRated 5 out of 5 stars2 weeks agoIdeal LTD/ESP solution.
These Ratio tuners are the absolute best drop-in solution for LTD/ESP tuning issues. Simple and quick to install, without the adaptive templates, and the tuning results are exceptional. I use a strobe bench tuner, and these machine heads yielded the most accurate results that I've ever seen. Highly recommended.
Installed on an LTD EC-1000 Deluxe, as shown in photo.
Was this helpful?Graph Tech Guitar Labs Ltd.2 days agoThanks Scott, and thanks for the photo! Play On! Dave D