"Spin-tested to ensure field point accuracy on every shot, the deadly Black Hornet Broadhead from Magnus combines strength and razor sharpness to put game down. Diamond-shaped design combines razor sharp, knife-grade stainless steel blades with a strong tanto tip to deliver bone-splitting penetration on the biggest game animals. Strong aircraft-grade aluminum ferrule is spin-tested within .002"" to help ensure true flight every time you release your arrow. 4 blades. Cutting Diameter: 1-1/4"". 3 pack. Manufacturer model #: BH100-4. Field tip accuracy, deadly penetration Spin-tested, aircraft-grade aluminum ferrule Razor sharp, knife-grade stainless steel blades Diamond-shaped design with a strong, bone-splitting tanto tip 4 blade design - 1-1/4"" cutting diameter"