This expandable, two-bladed broadhead is designed for high speed crossbows. Tested up to 450 fps! The Havoc HS has a smaller profile and provides you with the power of the "DualTrap" blade retention system. The Havoc HS has Lutz Blades, this unique kind of German sharpened metal is the sharpest blade in the industry. It's not whether you can afford to have it, it's whether you can afford not to have it.