A picture might help. "google-fu" The first link has a good picture and narative. It also has a really cool picture. Click the picture and you get a link to a bunch of "History of the National Gaurd" picture/narratives that is really good. The second site has links to instructional video. Oh it's Vet owned -- former PJ. What's the NSN? The boys are off to see Uncle Stan in a month.
http://swattourniquet.com/
http://swattourniquet.com/videos.html