Magnus Black Hornet Ser-Razor Replacement Blade. Designed for both the 2-blade and 4-blade 150-grain models these blades are precision-crafted for performance. The pack includes three 100-grain blades each carrying the promise of American craftsmanship and a Lifetime Guarantee. Specifications for Magnus Black Hornet Ser-Razor Replacement Blade: Manufacturer: Magnus Color: Black Features of Magnus Black Hornet Ser-Razor Replacement Blade: Specially designed for Black Hornet Ser Razor 150 Grain broadheads Suitable for 2-blade and 4-blade models Maintains high performance and accuracy Includes three 100-grain main replacement blades with a Lifetime Guarantee Recommended spin test after replacement for ensured true flight Package Contents: Magnus Black Hornet Ser-Razor Replacement Blade