Imperial Thickness Gauge for Festool Domino DF500 Works with 1/2", 5/8", 3/4", 7/8",1", 1-1/8", and 1-1/2" thick wood. Made from ABS plastic to .005" tolerance. Easy to read marking thickness on side of gauge. Designed for actual stock thickness not nominal plywood thickness. 30 Day Money Back Guarantee and 1 year warranty.