NAP Quadcutter 100gr Fixed Broadhead - 3 Pack - Quadcutter is one piece ferrule with X-lock 4 blade system that ensures blade retention on impact. Individually spin-tested for optimal down-range flight performance. Single piece CNC-machined Grade 5 Titanium ferrule .031in thick, razor-sharp replaceable stainless-steel blades Practice blades included 1-3/16in cutting diameter