As a boy, countryman, farm worker, professional Highland deerstalker, I carried a decent sized lock knife for all of my working life. Only latterly, when the law on knives became much more strict, I had to take great care about what was in my pockets. Lock knives were taboo unless in use or being carried to or from work. An ordinary clasp knife can only have a blade up to 3" long. I retired not long after this came in, the knife I carry now is a "Super Tinker" Swiss army Knife.