I once saw an online list of someone's PSK which included a ten penny nail. I assumed this was for use as an awl. I can see how it would be more heavy duty than the sewing awls I've seen, but I've never seen anyone else ever include a nail in a survival kit. So, it was interesting to read Chris' post suggesting horseshoe nails for use as awls. Has anyone actually improvised with nails in this way, using them as awls? It sounds very useful; was it? Would a large nail be worth inclusion in a PSK? And if so, which kinds of nails (large, small, normal, horseshoe, other...) might be most useful?