A small metal sword passes through another metal sword. Totally examinable, and the spectator can do it themself and be none the wiser.
This is a great pocket trick/puzzle, and what I really like about it is that you can make this thing do magic without even knowing yourself how it works. It’s very clever, and I’m still not quite certain how it works, but it does! Totally self working, and a true magic puzzler. This is a great conversation starter around the water cooler.