RAMCAT HEMOSHOCK MECHANICAL BROADHEADS 100 GR. 3 PK. Hemoshock is an expanding broadhead that uses Air Foil Technology, a ferrule tip which push air around the trailing part of the head to fly straighter. Ramcat has added Firenock Aero Centric Technology (F.A.C.T.), a double-O-ring system on the treaded shank for perfect alignment. The Hemoshock has a 2-3/4-inch expandable cutting surface. It is 100 grains and comes in a 3 pack