The Spitfire 3-Blade Broadheads have a patented blade retention system that eliminates the need for rubber bands and O-rings. The scooped-out Slimline ferrule delivers superior flight and unparalleled penetration. All blades are ground, honed and stropped. Per 3. Available: 85-grain, 1-1/4 cutting diameter 100-grain, 1-1/2 cutting diameter 125-grain, 1-1/2 cutting diameter Cancer and Reproductive Harm- www.P65Warnings.ca.gov. Type: Mechanical Broadheads.