113 may then be hollowed out to fit over said arrow shaft in such an arrangement the inside of hollow second end 113 may be threaded to mate with threads on the outer surface of the arrow shaft or distal second end 113 may be press fit over the arrow shaft alternatively second end 113 may be fitted over the end of the arrow shaft and glued or otherwise sealed to the arrow shaft a second key feature of broadhead arrowhead 100 is the inclusion of mechanically deployable blades 121 including an inertial trigger mechanism that both inhibits premature deployment during release and flight yet also facilitates deployment during impact with the intended target such a trigger is also found in the pending application of kuhn u s patent application ser no 10 766 664 each deployable blade 121 comprises an elongated third blade portion 123 that is sharpened on the side adjacent to body 107 when in the closed position integral to a first end of third blade portion 123 is a semi circular cam shaped fourth blade portion 120 integral to a second end of third blade portion 123 is a flag shaped fifth blade portion 124 fifth blade portion 124 comprises between about 20 and 50 of the total length of deployable blade 121 both elongated third blade portion 123 and integral cam shaped.