The Thunderhead broadhead from New Archery Products is widely recognized as the finest fixed blade broadhead ever created available in 85, 100, and 125 grain options. Features of the New Archery Products Thunderhead 5 pieces broadhead set: - Widely recognized as the finest fixed-blade broadhead ever created; - 1 1/8” cutting diameter - 85 grain; - 1 3/16” cutting diameter - 100 and 125 grain; - no lock rings or O-rings to hold blades in; - Designed for ultra fast bows. The micro grooved ferrule of the NAP Thunderhead broadhead 5 pieces set greatly increases flight accuracy and penetration power which is perfect for any type of hunting. The Diamize sharpening process creates the sharpest blades in the industry for massive hemorrhaging and knock down power of the NAP Thunderhead set and designed for ultra fast bows. The fixed blade construction of the New Archery Products Thunderhead broadhead set is strong and tough enough with less chance of malfunction to ensure quicker kills. The Thunderhead broadhead set from NAP features 1 1/8” (for 85 grain option) and 1 3/16” (for 100 and 125 grain products) and it doesn't require any lock rings or O-rings to hold blades in.