You should really look into the Cold Steel American Lawman or the Mini Lawman. It sounds like the mini Lawman would be too small for your needs. I don't think you'll find a stronger locking mechanism and for the size knife it is, it's pretty light. It is kind of wide in the pocket, but it's super tough. Came super sharp out of the box. It's got a goofy coating on it, but if you're looking for toughness, cost, and lock strength I don't think you'll do better than the Lawman.