Wasp Jak-Hammer SST Broadhead 3 Blade 125 gr. 3 pk.. Blades are kept in the closed position by an o-ring and open by folding back on impact. Package Contents: Wasp Jak-Hammer SST Broadhead Features a Stainless Smart Tip to create a straight cutting path with the blades. Blades are kept in the closed position by an o-ring and open by folding back on impact.