Categories›Guitars›Graph Tech PRL-8731-B0 Ratio Electric 6-in-Line Locking Machine Heads with Classic Buttons (Black)
Updated 12 May 2026
| Brand | Graph Tech |
| Category | Guitars |
| Available at | 1 UK stores |
| 90-day avg | £136.50 |
Graph Tech
Graph Tech PRL-8731-B0 Ratio Electric 6-in-Line Locking Machine Heads with Classic Buttons (Black)
£136.00£164.00↓ 17% offFair Price
Cheapest at Bax · 1 store
Deep Intelligence Analysis
RSI · Bollinger Bands · Buy/Sell Signal · News
PRICE HISTORY
Current
£125
Change
+5.5%
Avg
£124
Low
£117
High
£134
Volatility
3.5%
PRODUCT DESCRIPTION
- Part of the Ratio Electric Series, this six-pack of 6-in-line Graph Tech PRL-8731 machine heads features advanced Ratio Electric tech to ensure smooth, accurate and ultra-stable tuning. This patented system basically ensures that every tuner adjusts the pitch at the same rate, meaning that a half-turn raises or lowers the pitch of every string by around a semitone. These are also locking tuners, so after the string is threaded through, it&apos
- s locked in place by turning the thumb screw on the back of the machine head, and once you&apos
- ve given your strings a stretch, they can be tuned with surgical precision. The Graph Tech PRL-8731 tuners feature classic buttons and are easily mounted via a two-screw system, but can also be combined with one of the four included InvisoMatch mounting plates to adapt them for headstocks that are already set up for different screw systems.