X-ACTO 100 CORNER STRIPPING REPLACEMENT KNIFE BLADES. IN BRAND NEW RETAIL PACKAGING. X-ACTO X623 100pc No 23 Corner Stripping Knife Blades. For corner cuts, and trimming in tight areas. Plastic, wood, linoleum, rubber, and foam. Fits 3/8 inch X-ACTO No 2, Type c, and Type D handles.