CATEGORY
Setup & Adjustment
Setup is measurement, and measurement needs instruments. Everything in this category is about reading what the guitar is actually doing — relief, action, nut height, intonation — rather than guessing at it.
What this category coversAction gauges, feeler gauges, notched straightedges, string winders and capos — the measuring kit that turns a guitar from playable into good.
Action gauge
Reads string height at the twelfth fret without arguing about it.
Setup & AdjustmentMeasuring
Feeler gauge
The only honest way to measure relief and nut height.
Setup & AdjustmentMeasuring
Notched straightedge
Reads the fretboard itself, not the tops of the frets.
Setup & AdjustmentMeasuring
String winder
Turns a fifteen-minute string change into five.
Setup & AdjustmentHand tool
Capo
Clamps the strings at a fret — and shows up any setup problem.
Setup & AdjustmentAccessory