When it comes to reliable performance in a mechanical broadhead, nothing comes close to the WASP Jak-Hammer SST. As with all WASP SST broadheads, the Jak-Hammer features a pre-aligned, Stainless Smart Tip (SST). The edges of the Trocar Smart Tip are factory-aligned with the rise of the three stainless-steel blades, creating a straight cutting path that opens a gapping wound channel, ensuring maximum penetration. The three surgically sharp stainless-steel blades fold forward in flight and are retained by an O-ring. Blades deploy on impact and fold back to a cutting diameter of 1-1/4". The Jak-Hammer SST also has a unique feature which allows for target practice without damage to the broadhead or blades. When blades are in the forward flight position, take Spider Wire fishing line or thin copper wire and put 6 to 8 wraps around the outside of the forward notches. This prevents the blades from deploying, even when shot into high density foam targets. 100-Grain. .036 blade thickness.