These 2-blade replacement blades are .032-inch thick, honed razor-sharp stainless steel, running 1 inch in flight and expanding to a 2-inch cut after penetration. Two sets of blades work together for greater momentum and pass-through: the first set takes the impact and cuts through hide and bone, while the second stays closed until entrance to keep it razor sharp for maximum damage. The point is hardened high-carbon steel and the ferrule is anodized aircraft aluminum; blades install into the ferrule slot and are secured with a setscrew. Sold 6 to a pack.