X-ACTO X218 5pc No 18 Heavyweight Chiseling Knife Blades. For deep cross and smooth wood chiseling. Balsa, wood, linoleum, and bass wood. 1/2 inch edge. Fits 3/8 inch X-ACTO No 2, Type c, and Type D handles, as well as Excel K2, K5, K6, and K7 Handles. This is the replacement for X-ACTO X18, which has been discontinued by X-ACTO.