Headstock layouts
| Layout | Tuner arrangement | String pull | Common on |
| In-line 6 (Fender-style) | All six tuners on top edge | Strings pull toward one side; longer paths for low strings | Tele, Strat, most Fender-derived |
| 3+3 (Gibson-style) | Three per side | Symmetric; shorter, more direct paths | Les Paul, SG, ES‑335, PRS |
| Reverse in-line | All six on bottom edge | Treble strings get the longer post path | Hendrix-style upside-down Strats, some Jackson/Charvel |
| 4+2 | Four on top, two on bottom (or vice versa) | Compromise; designed for compact reach | Music Man, Ernie Ball |
| Headless | Tuners moved to the bridge end | No headstock at all | Steinberger, Strandberg, Kiesel |
Headstock angle
The break angle of the strings as they leave the nut. This determines how firmly the strings sit in their nut slots.
| Style | Angle | String pressure at the nut | Need string trees? | Common on |
| Flat (Fender) | 0° (parallel to neck) | Light — relies on tuner post height | Yes, for high E and B (and sometimes G) | Tele, Strat |
| Angled (Gibson) | ~14–17° | Strong, even across all strings | No | Les Paul, SG, ES‑335 |
| Scarf-jointed angled | ~13–14° with a glued joint | Same as one-piece angled | No | Many import guitars, modern boutique |
An angled headstock is structurally weaker than a flat one (Gibson’s broken-headstock reputation), but doesn’t need string trees. A flat headstock is robust but needs trees and staggered tuner posts to keep break angle consistent.
Tuner types
| Type | Mechanism | Tuning stability | String change speed |
| Open-back vintage | Visible gears; usually 12:1 ratio | Adequate | Standard wrap-and-trim |
| Sealed (Klusons, Grovers) | Enclosed, lubricated gears; 14:1 to 18:1 | Better — finer adjustment | Standard wrap-and-trim |
| Locking | Pin clamps the string at the post | Excellent — no string slip | Very fast; one wrap or less |
| Staggered post | Decreasing post heights from low E to high E | Good — eliminates need for some string trees | Standard |
| Auto-locking (Sperzel, Hipshot Grip-Lock) | Spring-loaded; locks as you tune up | Excellent | Very fast |
Practical tips
- Most “my guitar won’t stay in tune” problems are at the nut or tuner, not the bridge. Check break angle and slot lubrication first.
- Stretching new strings the right way (gentle pull at the 12th fret, retune, repeat) settles them faster than playing for an hour will.
- Locking tuners pay off most for tremolo users and people who change strings often. They do not improve tone.
- String trees should be lubricated (a dab of graphite from a pencil works) so strings don’t bind under bends.