Viper Venom cut-on-contact broadheads offer unsurpassed penetration while featuring the patent-pending Spiral Wound Channel. Viper Venom's fly like mechanicals, yet with all the knock down power of fixed blade broadheads. Razor-fang bleeder blades feature the patent-pending 59.8? offset Kore-Kut blades. Absolutely no wind planing. Faster, flatter and more accurate broadheads. 1-1/4" cutting diameter.