The Seneca Woodworking Imperial Thickness Gauge for the Domino DF500 allows you to quickly and effortlessly adjust the Domino fence offset to center your mortise on a variety of imperial material thicknesses. The gauge installs in less than a minute using a Torx T10 bit (not included), and is a direct replacement for the metric thickness gauge included with your Domino DF500. 

The Imperial Thickness Gauge is CNC machined from Delrin material and designed to center on 1/2", 5/8", 3/4", 7/8", 1", and 1-1/8" nominal ply thicknesses.