WASP ARCHERY Z-FORCE 100GR EXP BDHD 3PK Patented Rear Deploy Ball Bearing design for easy, Zero Force deployment that will not open during flight, even with the highest speed bows Razor Sharp .036" blades are Precision Ground and Honed and are always perfectly in line with the Trocar Tip edges to increase penetration 100% steel construction with a 1-5/8" Cutting Diameter 100 grain mechanical - 3 per package Field Point Accuracy - Made in the USA