I see many of the nice and great knives that your showing will have a leather or cord thong. Some with a bead tied thru a hole in the handle. Why? In my mind I see something to trap blood,fat and goo. This is why I gave up on my folding hunting knives. Standing at the sink scrubbing deer fat out of the inside of a folder is not the way I want to spend my time in deer camp.....
