Layout mortises, mark shoulders, scribe circles, the Digital 3-in-1 Marking and Mortising Gauge does everything a traditional gauge does and more. But that's not all. As a digital gauge, it does it all with an accuracy of 1/1000th of an inch. Versatile 3-pin design allows you to set up the gauge in several different configurations, depending on the operation. Solid stainless steel construction.
Features:

Precision Digital Marking, Mortise, Divider Or Marking, Depth, Height gauges 3-in-1
Large LCD, 3 Digital reading: inch, metric, inch fractional
Hardened Alloy Pin
Precise Marking on Steel & Wood Surfaces
IP54 Humidity & Dust Resistance
Precision Drawing & Marking Instrument