Muzzy Bowhunting Broadheads, 4 Blade, 1 Inch Cutting Diameter 90 or 100 Grain, 6 Pack 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 6 Pack, Made in the USA 6 Pack