We don’t ever recommend violence, but sometimes you need a weapon to make your costume look a little more tough or scary (accessories are very important when it comes to Halloween costumes). Here’s the thing: Whatever you do, don’t go around carrying real weapons in your Halloween costume. It’s too dangerous and someone could get hurt. A better option is this disappearing knife. This plastic knife with cross hatch grip features a 3” silver blade that retract into the handle, so even if you accidentally stab somebody, you won’t cause any damage. Also, you can have some fun in your scary serial killer costume by going crazy and stabbing guests at your Halloween party. Also, if you’re tired of carrying it, you can slip it into your pocket without running the risk of cutting your costume or even yourself. Add some toughness (and some magic) to your costume with this retractable blade disappearing knife.