X-ACTO X215 5pc No 15 Keyhole Saw Knife Blades. For small interior cuts. Plastic, balsa, cardboard, thin metals, soft wood, and foam. Narrow, long-reach blades. Fits 3/8 inch X-ACTO No 2, Type c, and Type D handles, as well as Excel K2, K5, K6, and K7 Handles. X-ACTO does not offer this item in larger packages.