Magnus Black Hornet Ser-Razor 4 Blade 100gr Fixed Broadhead - 3 Pack - The Black Hornet Ser-Razor incorporates a Chiseled Serration for more effective cutting inside an animal - and that equals greater blood trails. The Black Hornet Ser-Razor is made from knife-grade stainless steel and is shaving-sharp right out of the packaging. It is precision-machined and spin-tested for perfect flight every shot, every time. 1 1/4in Cutting Diameter .059in Thick Main Blade .040in Thick Bleeder Blade 100 Grain Replaceable Blade MPN: BHSR100-4