The Trypan Crossbow’s .039-inch-thick razor-sharp stainless-steel blades slide into a sweptback blade-angle configuration, and despite the fact that the blades deploy to a monstrous 2-inch cutting diameter, the broadhead has just a 3/4-inch diameter profile in-flight. The red polymer Trypan-specific SHOCK Collars provide exceptional blade retention and consistent, reliable blade deployment. The one-time use SHOCK Collars are indexed to notches in the Trypan’s titanium ferrule, so they can never be put on incorrectly and each package includes an additional 3 high-energy shock collars.