Could anybody give me a website demonstrating how a dual action (not sure if that's the correct term, but I mean the type which shoot out and retract with a lever) switchblade works or maybe just explain how they work?








Could anybody give me a website demonstrating how a dual action (not sure if that's the correct term, but I mean the type which shoot out and retract with a lever) switchblade works or maybe just explain how they work?