Wasp Jak-Hammer 100 SST 1 3/4" Cutting Diameter Broadhead Time Tested mechanical design features a Stainless Steel Trocar Tip, Precision Machined and Hardened to Rockwell 46C and Hollow Ground to a near razor edge to blast through bone Razor Sharp .036" blades are Precision Ground and Honed and are always perfectly in line with the Trocar Tip edges to increase penetration Neoprene O-Ring deployment system with a 1-1/4" Cutting Diameter 100 grain mechanical - 3 per package Field Point Accuracy; Made in the USA