Our String Action Guitar Gauge Ruler is made from quality material, which is not only wear resistant but also stable. It is also a "Swiss Army Ruler" for setup adjustments on any stringed instrument.
This pocket-size stainless steel rule has become a luthier's favorite in busy shops. It's the best way yet to get vital measurements on acoustic and electric instruments.
The back of the gauge has a time-saving fractional/decimal/metric conversion chart. The String Action Gauge is made of durable stainless steel with precision-etched markings, and fits right in your pocket.
1 String Action Ruler