The Bloodsport Gravedigger Extreme is designed for use with compound bows and crossbows. The hybrid mechanical broadhead delivers even more devastating results than its predecessor. Hardened stainless steel blades create a deadly 2.25" cutting diameter. Further propelled by a 1.25"cut-on-contact fixed blade, the Gravedigger Extreme penetrates the hide then deploys inside for maximum blood loss. Blades are 420 stainless steel. No rubber bands or O-rings. Patented Blade Retention System keeps blades closed until entry.