The Trend Gauge1 is A metal rule depth gauge to set the height of router cutters and saw blades accurately It will measure horizontal and vertical for hand router router tables and saw benches it has a 60mm wide aperture and is accurate to 05mm with an 80mm measurement range It has U section plastic injection moulding with unique cam lever lock a steel rule with metric and imperial scale This gauge is self-standing for setting cutter depth on router tables and low profile for back fence adjustment