New Archery Products Thunderhead Replacement Blades - 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. Choose from 100 or 125 Grain18 PackReplacement bladesMicro grooved slimline FerruleDiamize sharpened blades