Trend GAUGE/1 Router Depth Gauge - Metric/Imperial A metal rule depth gauge to set height of router cutters and saw blades accurately. TREND GAUGE/1 FEATURES Horizontal & vertical measuring For hand routers, router tables and saw benches. 60mm wide aperture & accurate to 0.5mm 80mm measurement range U section plastic injection moulding with unique cam lever lock Steel rule dual metric & imperial scale Self standing for setting cutter depth on router tables and low profile for backfence adjustment Patent No. GB2386085 & US7000331