Performer displays a cylindrical brass block and a brass tube (closed at one end) into which the block just fits. Also displayed is a metal rod. The block and tube both have a hole through them. When the block is placed in the tube, and the rod pushed through the hole, the block is locked in place in the tube. It cannot be removed. Yet the performer causes the block to penetrate off the metal rod with a mere tap of his hands. You get the brass block, the tube, the metal rod, and complete instructions. This works just like our plastic Block Penetration effect, and if you have that item, this is not a different trick, but it is a quality product, made in Brass, for performers that wants only the best imprecision magic.