This is one of my favourite knives these days. Modelled after a regional knife of the Piémontais in France, aptly dubbed Piémontais or couteau de montagne, I made it from red deer antler, and a simple blade forged from 1.2842 (O2). Selective temper, of course, including the rivet hole, obviously.
The blade has a steel axle that is peened over brass washers. It is a bit tricky to make them right, because you do not have much room for mistakes. But you need very few tools... this one was made with a Victorinox locksmith SAK period. (Apart from the forge, hammer, tongs an angle grinder (before tempering) and a water-based grinding stone. Nothing else. )
The friction of the antler keeps the blade in surprisingly well, so good in fact that it actually rides in my pocket every day with not so much of a worry of hurting myself. I like that the design is simple and rugged. it makes it not only reliable, but with but a little practice you could make a handle in the woods with just a SAK. Practice makes perfect, and I love to make those at the moment, so I will keep you posted! Promise! ;-P