Small Batch Tool: Rabbet Gauge Set 1/16" to 3/4" 12 common rabbet dimensions in 3 convenient gauges. Lay out rabbets quickly and accurately with Blue Spruce Toolworks Rabbet Gauge Set. Three precisely machined blocks with 4 dimensions in each block give you a total of 12 common fractional dimensions (1/16" to 3/4" in 1/16" increments).