I have to start out by admitting I’m not really much of a knife person. However, I bought one since I thought it would be a good idea. It’s a 6” “survival” knife made by Smith & Wesson. It has a sheath that I have questions about that I can’t find answers to by using Google. I even looked up “how to use a knife sheath” on Youtube and could only find vids on how to make one. The nylon one my knife came with has a number of loops and flaps, and even a long looped string on the bottom of it that is a 15” long loop. What is that for?