High-carbon steel tip for reliable penetration. Two small wing blades for cutting through hair, hide, and bones. Two long, ultra-sharp main blades that open upon impact. Opens so fast, you can hear the SWHACK! Mechanical broadhead features a high-carbon steel tip for reliable penetration; two small wing blades for cutting through hair, hide, and bones; and two long, ultra-sharp main blades that open upon impact for eviscerating internal damage.