Spitfires fly straight with pinpoint accuracy and perform better than any other mechanical thanks to the sharpest Diamize® blades. 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. 100 Grain