"Built to help crossbow hunters put big game on the ground fast, Rage Hypo 2 Two-Blade Mechanical Crossbow Broadheads fly true, open gaping wounds, and deliver big blood trails. This performance broadhead pairs a fine-tuned take on the deadly Hypodermic with a new and improved shock collar system. A specialized design, this collar system features a triangular key that ensures proper alignment and installation every time. This new keyed design also allows bowhunters to use the collar more than once, offering multiple pedals to anchor the broadhead's blades tight until impact. Topped with an even-sharper Hypodermic hybrid tip for smooth penetration, the Hypo 2's steel ferrule houses 2 rear-deploying, razor sharp, 0.035"" stainless steel blades. Held in place by the shock collar, these deadly blades expand upon entry to a swept blade angle for deeper penetration as they deliver a wound more than 2"" wide for easy-to-follow blood trails. Designed to match the demands of modern crossbow hunters, the Hypo 2 delivers superior aerodynamics, velocity, and downrange energy on every shot. 4-pack. High performance, expandable crossbow broadhead with improved collar system Strong, smooth penetrating hybrid tip - now even sharper Specialized shock collar system - holds blades tight until impact Triangular key system - ensures proper alignment and installation every time Reusable design - collar can be used up to 3 times 2 rear-deploying 0.035"" stainless steel blades - razor sharp Big 2""+ wide wound channel 4-pack"