New Archery Products Killzone Maxx 100gr Expandable Broadhead - 3 Pack - The Killzone Maxx is NAP's largest cutting diameter broadhead in the Killzone line. A devastating 2-3/8in cutting diameter along with Killzone's rear-deploying design and patented blade retention technology. The field-point accurate Killzone Maxx uses NAP's unique spring-clip design which ensures your blades won't open in flight or in your quiver. There are no o-rings or rubber bands to worry about. Rear Deploying 3 Blade Design Field Point Accurate Spring-Clip Design No O-Rings Or Rubber Bands Devastating 2-3/8in Cutting Diameter