I don't carry stuff in my pockets as it bugs the hell out of me, I prefer to carry a small blade around my neck instead. My current favourite is this one from Lance ...
http://www.bushcraftuk.com/forum/showthread.php?t=64658&daysprune=-1
You just jogged my memory. I learned about the "fid" back in Scouts too. Odddly never saw wire rope )cable) spliced. On aircraft cables we joined or shaped with swages; ground structure cables were usually joined with u-bolts.