Dead Ringer DR4781 100/125-Grain Trauma Replacement 2 Blade, 2-Inch Adjustable speed grooves allow you to adjust for higher speed bows. 3 3/4 Cutting Surface When Deployed T-6 aluminum ferrule and the most durable O-ring retention system Dead Ringer DR4781 Trauma Replacement Blade 100/125 Grain 2 Blade 2" Dead Ringer is dedicated to the hunter and outdoor enthusiast in providing products with the quality or high performance they expect