Give the blades on your high-performance Hypodermic Trypan broadhead more holding strength without losing any performance with Rage Hypodermic Trypan Broadhead Shock Collars. Made of a high-strength advanced polymer, this high energy design prevents broadhead blades from deploying prematurely if your arrow or broadhead gets bumped. These collars hold blades tight and quiet until impact, when they break away without hindering blade deployment.