This broadhead is one of the most devastating mechanical broadheads available featuring a massive 2-3/8" cutting diameter. Utilizing NAP's spring clip design, the Killzone eliminates pre-mature blade deployment ensuring your broadhead will be ready to go when you are. Maximize the performance of your archery equipment with the Killzone Maxx. Features 2-3/8" cutting diameter. No O-rings or rubber bands. Cut-On-Contact tip. Reliable expansion. Free practice head included.