This Magnus Stinger is a 100 grain 4-Blade Scary-Sharp Broadheads! 2-1/8" x 1-1/16" It has a Doube-Edged bleeder blade with a 3/4" width. The Stinger 100 Grain is knife-grade stainless steel and aircraft aluminum ferrule. It is razor-sharp out of the package and perfect for the fastest bows. It is screw-in only and comes 3 per pack.