Graph Tech PRL-9721-B0 Staggered Locking 6 In-line Electric Tuners
The PRL-9721 is a right-handed set of Locking RATIO® Calibrated Machine Heads for electric guitars that use 6-in-line tuners with staggered posts (eliminates the need for a string tree).
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The Graphtech PRL-9721 is a right-handed set of Locking RATIO Calibrated Machine Heads for electric guitars that use 6-in-line tuners with staggered posts (eliminates the need for a string tree).
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: 0.083 lbs (38g)
Weight per set of six: 0.496 lbs (225g)
String diameter: up to 72 gauge
Customer Reviews
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Charles D. 🇺🇸
Verified Buyer
Must-have Hardware
These tuners are amazing. They are a breeze to install, even for those with limited technical skills, and significantly increase tuning stability. They also make string changes effortless. Their individual gearing makes it extremely simple to keep your instrument in tune. I have installed these on a...
Published date
08/30/25
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Jeremy H. 🇺🇸
Verified Buyer
I got these tuners to
I got these tuners to upgrade the ones on a cheaper guitar I purchased last year. The tuners in it were terrible. I would have to retune between songs and sometimes even during a sing if it had any bends in it at all. As of now, ive had the new tuners installed for a few weeks. Im highly impressed i...
Published date
03/21/26
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Questions & Answers
2 answered questions
S.D.W.
Verified User
Q: I need 8 of these. Can I buy a set of 6 and then two individual tuners separately?
Answers on Content by By AMS Customer Service on Tue Sep 09 2025
A: We do not have these tuners available a la carte (individually) and won't be able to sell you the pack of 6, and then an addition 2 tuners.
By AMS Customer Service
09/09/25
Justin
Verified User
Q: Would these work on a reverse headstock?
Answers on Content by By AMS Customer Service on Mon Jul 28 2025
A: This should work to replace any right-handed set of tuners.
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