Magician introduces a bolt and a nut. Now he asks spectator to fasten the nut onto the bolt half way. The magician holds the bolt, and then he sends his psychic power towards the bolt. The nut on the bolt visually starts spinning, then completely comes unscrewed from the bolt. The bolt and the nut are completely examinable right after the effect without switching out anything.

The bolt itself contains the gimmicks inside, even the batteries. Because of that, you don?t have to wear a long-sleeved shirt like before. Any kind of clothes is OK, even you are naked, it definitely works. You can hand the bolt and the nut to spectators without switching out anything.

No Angle restriction , no Switch out, no need to reset, immediately examinable. 
Comes with a gimmick nut, and english instruction.
Nothing to hide in your hands.
No complicated body hook ups.
Can be immediately repeated as many times as you want.
Fully examinable before and after the effect.
Easy battery replacement.
Uses a battery commonly sold in stores worldwide.
No clothing limitation. You can wear short-sleeves. 
You don't even have to be wearing clothes!
No switches are required. In fact, no sleight of hand is needed.
No suspicious moves.
Audience themselves screw the nut onto the bolt and also you can hand the bolt and nut to them immediately after the effect