New Archery Products 130 grain replacement ferrule (ferrule only) for the Razorcaps broadhead. 3 Pack. Used to create a heavier grain broadhead.Razorcaps’ broadheads are a laser welded, ultra sharp, cutlery-grade stainless steel, cut-on-contact head. These unique broadheads provide field-point accuracy even at high speeds. Razorcaps super thick .04” stainless blades are one of the easiest replacement systems in the industry. They are the only cut-on-contact replaceable blade unit on the market today. They have a unique weight adaptable ferrule system that allows the hunter to change head weights. Ferrules come in five grain sizes providing five different weighted heads from 100 to 200 grains in 25 grain increments. This enables the archer to select the optimum weight combination depending on arrow spine, balance and the game that will be hunted. The cutting surface of the Razorcaps is over six inches in length with a 1-1/8” cutting diameter.