Take the bolt and nut out and let the audience screw the nut onto the bolt. You can perform the trick in any condition without practicing any skills., Ultra energy is applied to the bolt, obviously, you'll see the nut begin to spin up, Until it completely unscrew to come off the bolt., Bolts and nuts, before or after the performance can be handed over to the audience to check. They look just like any ordinary bolt and nut., Made of Metal, you can use it for years. It contains gimmicks and batteries inside.,