Excel 20103 - 2pc No 103 Concave Carving Knife Blade - For wood, plastic, rubber, foam, and vinyl. Size: 2 1/2 x 5/16 x 1 1/8 inch Edge. Made in USA. Fits 3/8 inch Type D and Excel K7 Wood Carving Handles. Excel does not offer this item in larger packages. Note: these are pretty comparable to X-ACTO X103, which X-ACTO has discontinued.