MFR#: 60-814 UPC: 033576608141 The new KillzoneA(R) Crossbow is a 2 blade rear-deploying broadhead that packs a devastating 2" cutting diameter and heavy-duty .039" blades for maximum durability. The field-point accurate KillzoneA(R) Crossbow 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. Designed for use in crossbows up to 400 fps. Features:Patented "Spring Clip" blade retention system to keep blades closed in flight2" cutting diameter for devastating wound channels & excellent penetrationHeavy-duty, Razor-sharp .039" bladesDesigned for use out of crossbows up to 400 fps