Our Single Bevel VPA 2 Blade Broadheads really live up to the hype! They are CNC Machined from one piece of steel. The ferrule supports the head all the way to the bone splitting tip. The Premium Tool Steel (S7) Single Bevel is heat treated to 56-58 Rockwell. The Carbon Tool Steel (1045) Single Bevel is heat treated to 50-52 Rockwell. The VPA single bevel line of broadheads have ideal blade thickness, extensive single bevels (35 degree blade angles), and edges that can achieve a razor sharp edge perfect for any style of hunt. Based on the recommendations of the Ashby Foundation, their straight angular shape has an edge over curved heads as well as provide an easy long term maintenance for the product with regards to sharpening and honing the product. Take advantage of the single bevel edge that helps with continued head momentum and penetration. Note: Always match right bevel with right helical vanes/feathers and left bevel with left helical vanes/feathers. Broadheads come with a factory grind. Final sharpening is recommended prior to hunting.