Digital Action Gauge

The first pocket digital device for measuring the action of the strings. Originally this device was a tire/tread depth gauge for automotive. The idea of turning it into a precision setup device was brought to guitar community by inventor Davide Bissoli in 2011. On the left, one of many models of digital tread depth gauge available in the market. In the middle and on the right, a modified version which can be used as a digital string height gauge.