For shaving, carving wood, wax, and clay. Size: 1 1/4 x 3/16 inch Shank x 1/2 inch Edge. Fits 3/8 inch Type c, and Type D handles(except Excel 16007), as well as Excel K5 and K6 Handles. Excel does not offer this item in larger packages. Note: these are pretty comparable to X-ACTO X163, which X-ACTO has discontinued.