Spitfires fly straight with pin-point accuracy and perform better than any other mechanical thanks to the sharpest Diamize blades and they stand up under the toughest conditions. Super-durable hardened high carbon steel Trophy Tip. Slimline ferrule improves flight and penetration. Micro-grooves to enhance accuracy and penetration. Snap-locking blade system holds the blades closed during flight. Stainless steel blades have the exclusive Diamize Edge for a super sharpness.