The replacement Die is Australian Made from M2 tool steel, blackened and hardened. Our patented designed ensures the Original Professional Nibbler cuts with no burrs or jagged edges. The tapered sides and rear of the die enable you to cut a tight 13mm or 1/2 inch radius plus it will cut around tight profiles. The die should be replaced every 3 or 4 cutters for better cutting performance. Spray WD40 or CRC along cutting path.