NAP(R) Thunderhead Broadheads feature Diamize(TM) sharpened blades that produce massive hemorrhaging and excellent knockdown power. Plus, Micro-grooved Slimline(R) ferrules greatly increase flight accuracy and penetration power. No other broadhead in the world flies as true as the Thundherhead, period. Diamize(TM) sharpened blades for massive hemorrhaging and excellent knockdown power Micro-grooved Slimline(R) ferrule for improved accuracy and penetration
