For decorative panel and veining work. Ideal for carving with the Routerlathe. Dimensions: D=3/8 inch D=9.5 mm C=7.5 mm R=4.8 mm Shank Diameter=1/4 inch Shank Diameter: 1/4 Diameter Imperial: 3/8 Diameter Metric: 9.5 Cut Length Metric: 7.5