TK-4 features a newly developed woven elastic textile band (3" wide by 40” long) that provides incredible strength and flexibility. With two steel hooks fastened steadfast (three thick hog rings per S-Hook) to both ends of the elastic band, and packaged in a small, vacuum-sealed pouch. TK-4 is the perfect solution for any kind of injury involving arterial bleeding. TK-4 has been deployed by the US Marine Corps, US Special Forces, and numerous law enforcement and emergency services. In April 2007, the Navy Experimental Diving Unit compared several of the leading self-applied tourniquets on the market including the H&H TK-3 and TK-4 models. Their research found that both H&H products ranked at the top for overall efficiency and product usability. "
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