"Muzzy 3-Blade Fixed-Blade Broadhead features hollow-ground, hardened steel TroCar Tips cut on impact and shatter heavy bone for maximum penetration while minimizing wind planing and enhancing arrow stability in flight. Unique blade system lets you change from practice to hunting blades in seconds. Vented .020"" stainless steel blades lock into slotted aluminum ferrule with patented locking system. Hardened steel TroCar Tip for maximum penetration and enhanced flight stability Blade system switches from hunting blades to practice blades in seconds Blades interlock in aluminum ferrule for additional stability Vented .020 stainless steel blades"