The Jak Hammer SST is designed to fly like a field point. The blades fly in a closed position and open when the broadhead hits its target. The SST tips are technologically aligned from the edges of the trocar tip to the rise in the vented blade. Features three .036" thick stainless steel blades designed for easy replacement with 1-3/4" cutting diameter on the 100 gr and 1 -1/4" on the 75 gr.