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7 Strings: 7-In-Line Ratio Electric Locking Machine Heads Staggered Posts (PRL-9721-x7, PRL-9731-x7, Select Finish and Button)

7 Strings: 7-In-Line Ratio Electric Locking Machine Heads Staggered Posts (PRL-9721-x7, PRL-9731-x7, Select Finish and Button)

PRL-9721-C7

702725248599

Regular price $187.77 USD
Regular price Sale price $187.77 USD
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Select Finish
Select Button Style

RATIO® patented gear technology
RATIO® - Calibrated Machine Heads incorporate different string gauges into the tuning equation.

From Low B to High E 48:1, 39:1, 24:1, 20:1, 35:1, 20:1, 12:1.

We balanced the gear ratios to each string simplifying the tuning process.

With RATIO®, a half-turn is a semi-tone!

Every string reacts the same to any tuning adjustment. Predictable, precise tuning, on every string.

RATIO Machine Heads explanation video

The PRL-9721-x7 and PRL-9731-x7 are the right-handed sets of Locking RATIO® Calibrated Machine Heads for electric guitars that use 7-in-line tuners with staggered posts (eliminates the need for a string tree).

It has a two-pin casing that can be used as is, or with our Patented InvisoMatch Mounting Plates [opens in new tab].

4 different sets of InvisoMatch mounting plates in brushed aluminum are included to make installation on most guitars fast and accurate by using your existing screw mounting holes.

 

6-in-line tuners set Staggered tuners set Ratio Tuned Machine Heads: The New Standard In Tuning Technology

Gear ratio: unique for each string position - one turn-one tone
Peg holes diameter required: 13/32" (10mm)
String post diameter: 0.236" (6mm)
String post length to string hole: 0.827” (21mm) - 0.787" (20mm) - 0.748" (19mm)
Weight per single machine head: 0.083lbs (38g)
Weight per set of six: 0.581lbs (266g)
String diameter up to 72 gauge
Includes 7 machine heads, mounting screws, and bushings
Includes complimentary 4 sets of aluminum mounting plates

UPGRADE TO PREMIUM PLATED INVISOMATCH View full details
5.0
Rated 5.0 out of 5 stars
Based on 183 reviews
Total 5 star reviews: 175 Total 4 star reviews: 8 Total 3 star reviews: 0 Total 2 star reviews: 0 Total 1 star reviews: 0
100%would recommend these products
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183 reviews
  • T
    Tom
    3+3 Ratio Electric Locking Machine Heads (PRL-8311, 8322, 8331, 8341, 8351)
    Reviewing
    3+3 Ratio Electric Locking Machine Heads (PRL-8311, 8322, 8331, 8341, 8351)
    I recommend this product
    Rated 5 out of 5 stars
    1 week ago
    5 Stars

    Love Graph Techs locking tuners. Second

    set I've put on a guitar.

  • BP
    Bill P.
    Verified Buyer
    6-In-Line Ratio Electric Locking Machine Heads (PRL-8721, 8731, Select Finish and Button Style)
    Reviewing
    6-In-Line Ratio Electric Locking Machine Heads (PRL-8721, 8731, Select Finish and Button Style)
    I recommend this product
    Rated 5 out of 5 stars
    1 month ago
    title

    Working very well!

  • RS
    Ray S.
    Verified Buyer
    6-In-Line Ratio Electric Locking Machine Heads (PRL-8721, 8731, Select Finish and Button Style)
    Reviewing
    6-In-Line Ratio Electric Locking Machine Heads (PRL-8721, 8731, Select Finish and Button Style)
    I recommend this product
    Rated 5 out of 5 stars
    1 month ago
    Killer Tuners!

    Literally installed in less than 5 minutes. Once the fresh set of strings were stretched out, the git stays in tune like nobody's business. I'm not a finesse type player. I beat the heck outta a guitar and made it wish it was never born. These tuners don't lose tune. Pretty amazing. Being locking tuners, string changes are killer fast as well. Highly recommend! 🤘 🤘

  • RB
    Randy B.
    Verified Buyer
    3+3 Ratio Electric Locking Machine Heads (PRL-8311, 8322, 8331, 8341, 8351)
    Reviewing
    3+3 Ratio Electric Locking Machine Heads (PRL-8311, 8322, 8331, 8341, 8351)
    I recommend this product
    Rated 5 out of 5 stars
    1 month ago
    Locking tuners FTW

    Super easy install, plates lined up perfectly, tuners work great! These will be my go-tos for all future tuner upgrades.

  • JM
    John M.
    Verified Buyer
    3+3 Ratio Electric Locking Machine Heads (PRL-8311, 8322, 8331, 8341, 8351)
    Reviewing
    3+3 Ratio Electric Locking Machine Heads (PRL-8311, 8322, 8331, 8341, 8351)
    I recommend this product
    Rated 5 out of 5 stars
    1 month ago
    3+3 Ratio Electric Locking Machine Heads (PRL-8311, 8322, 8331, 8341, 8351)

    Awesome locking tuners. Highest quality and precision.

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