Rage Hypodermic Crossbow Expandable Broadheads - 3 Pack - FAT technology delivers maximum performance and consistency by ensuring proper ferrule-to-bolt alignment. Solid steel construction with a patented tip that rips through hide and bone. High-energy shock collar securely holds the blades in flight and ensures proper deployment upon impact. Stainless Steel Hypodermic Ferrule Choose from 100 or 125 grains 2 in Cutting Diameter .035 Blade Thickness High Energy Series Shock Collar Package of 3