Template thickness should be 5mm thicker than cut length of cutter. Dimensions: D=19 mm C=32 mm OL=80 mm B=19 mm R=3/8 inch R=9.5 mm Shank Diameter=1/2 inch Shank Diameter: 1/2 Diameter Metric: 19 Cut Length Metric: 32 Bearing Diameter Metric: 19