The sharpest blades. The best quality. A perfect fit between blades, ferrule and point. We're constantly improving Thunderhead components so you can trust Thunderheads on price, quality and performance - every time! High Carbon Steel Trophy Tip ® is HARDENED for the most devastating durability available on the market! Stainless Steel Blades have the exclusive Diamize Edge for a visible super-sharpness you can see for yourself! The patented scooped out Slimline® ferrule improves flight and penetration, only on Thunderheads. The original lock ring, o-ring blade retention system we invented - proven a million times over! New Thunderheads for Carbons! Your favorite Thunderheads plus 6 U.B.A.R's all in one package! This box contains 6 100gr 3 blade fixed broadheads that are .027 thick and have a 1 3/16 in cutting diameter.