Estimated read: 6 minutes After four decades of training thousands of students, I've noticed something: people tend to think about self-defense weapons the way they think about hammers. One tool, one job, end of story. But the truth is more nuanced — and getting it wrong can cost you legally, financially, and morally, even when your initial instinct was sound. A self-defense weapon is a tool. Like any tool, it's designed to solve a specific problem under specific conditions.