We first mentioned counterfeit Combat Application Tourniquets back in 2010 and they had already been a problem for awhile. Recently, there has been a rash of these fake products showing up in various supply chains of law enforcement and first responder agencies. For example, this clinical bulletin was issued just this week by the New Hampshire Department of Safety.
According to North American Rescue, they’ve identified six different counterfeit CATs. While this link offers a great comparison between a genuine CAT and a counterfeit, the simplest thing to check is the windlass. If it isn’t stiff, ask for a real one.