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Graphtech

Graph Tech PRL-8721-C0 Locking Tuners

The Graph Tech PRL-8721-C0 Ratio Electric 6-In-Line Locking Tuners offer excellent quality, easy installation, and improved tuning stability. However, be careful as some customers reported receiving the product with one tuner missing and packaging issues. Despite these concerns, it's a solid choice for enhancing your guitar's performance.

Model: PRL-8721-C0UPC: 702727000478
Lowest at any Popular Retailer
$136.80 at Sweetwater

Where to Buy

Prices last updated: May 1st 2026 11:58 am

Product Score

Based on professional reviews and customer feedback

8.43/10
Overall
9.39
Expert
7.46
Consumer

Why this score?

The Graph Tech PRL-8721-C0 Ratio Electric Locking Tuned Machine Heads achieve a high rating due to their exceptional tuning stability and stylish design appreciated by most users, particularly guitar players looking to upgrade their tuners. However, some customers reported issues with packaging and fitment, which slightly tarnished the overall satisfaction with this premium product. With a competitive price point, they represent a solid investment for enhancing guitar performance.

8+ Excellent
6-8 Good
4-6 Average
<4 Poor

Score

The Graph Tech PRL-8721-C0 Ratio Electric Locking Tuned Machine Heads achieve a high rating due to their exceptional tuning stability and stylish design appreciated by most users, particularly guitar players looking to upgrade their tuners. However, some customers reported issues with packaging and fitment, which slightly tarnished the overall satisfaction with this premium product. With a competitive price point, they represent a solid investment for enhancing guitar performance.

9.39/10
Expert
7.46/10
Consumer

Pros

  • High quality with easy installation
  • Fits various guitar models including G&L ASAT and Squier Stratocasters
  • Improved tuning stability
  • Sturdy construction
  • No additional drilling required for installation in some guitars

Cons

  • One tuner (#3 'G' string) missing from the package in some cases
  • Received the product in opened packaging with no protective sleeve

Bottom Line

The Graph Tech PRL-8721-C0 Ratio Electric 6-In-Line Locking Tuners offer excellent quality, easy installation, and improved tuning stability. However, be careful as some customers reported receiving the product with one tuner missing and packaging issues. Despite these concerns, it's a solid choice for enhancing your guitar's performance.

Read full expert review

What Reviewers Are Saying

Praised
good product6%
easy install13%
great quality13%
installation was straightforward6%
excellent functionality6%
improved tuning stability6%
Criticized
loose in the box6%
critical items missing6%
stay in tune13%
a little pricey6%

Customer Ratings

73 reviews averaging 4.1 out of 5 stars from Amazon
4.1
73 reviews
5
68%
4
4%
3
5%
2
10%
1
10%

Based on 73 reviews from Amazon

Discussion

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