Spitfire Magnum Broadhead (3-Pack), 170-Grain This massive kinetic energy producing 170 grain broadhead is made from all-steel construction for ultra high energy crossbows Diamize sharpening process creates the sharpest blades in the industry for massive hemorrhaging; The sharpest broadhead blades ever created 170 grain matched weight field points included in package for setup and tuning Patented micro grooved ferrule greatly increases flight accuracy and penetration power Extra weight provides better front of center weight distribution for optimal arrow flight; Large 1-1/4" cutting diameter