Rage X-Treme NC Cut-On-Contact 100gr Expandable Broadhead - 2 Pack - The redesigned X-Treme, now with the exclusive NC (No Collar) blade retention system eliminates the need for a Shock Collar, dental band or O-ring. Taking verse from the original X-Treme, the new-for-2020 2-blade design is centered around a 1.425-inch long high-strength 6061-T6 aircraft grade aluminum ferrule whose two. 039-inch thick blades instantly deploy to an enormous 2.3 inches upon impact. 2 Blade Broadhead 100 Grain Cut-on-Contact 6061-T6 Aircraft Grade Anodized Aluminum Ferrule .039in Stainless Steel Blades 2.3in Expandable Cut Integrated Blade Containment System 2 Per Package Replacement Blades Available