Parafuso de bronze da porca

Magic effect: a tightening of the screws, put iron tube, shake, this screw is automatically solved. But let the audience try, no matter how the audience shaking, not this effect have been completed.

2, high-quality metal fabrication, structural precision, simple operation, no need to block, no need to distance limitations, magic to the audience after completion of inspection, close the effect is very strong screw down the screws, put them inside the tube, then shake a few times, the screw naturally separated.