Whenever I'm out of the house, I've got one of a half-dozen folders to chose from, and one will go with me clipped in a pocket. Although it would certainly work for SD, I find myseld using them all the time for opening boxes, cutting twine, etc. The newest one is a 4" Benchmade, and it's a beaut! The only one that never leaves the house is the Italian stilleto. THe last I heard, they were illegal, and I figure if I ever need to use a knife for SD, I'll be in enough hot water and don't need to make it any worse for myself