Proven Spitfire strength, killing efficiency and accuracy with an innovative new blade design. Three .030-thick 440 stainless steel Diamize blades have straight edges for slicing through flesh and arteries, but also have serrated segments for cutting through bone. These blades open to create a 1-3/4 cutting diameter and are offset to create gaping exit wounds and easy-to-follow blood trails. Per 3. Cutting diameter: 1-3/4. Weight: 100 grain. Cancer and Reproductive Harm- www.P65Warnings.ca.gov. Type: Mechanical Broadheads.