With this item, a magician or mentalist may glimpse cards as they are being dealt or shown. This shiner is made from a circulated half a dollar in our shop. The half a dollar coin has been hollowed into a shell and a precision mirror put in place. The half a dollar Shiner comes with a small cloth drawstring bag for protection. This is sold for entertainment or lecture/demo use only. Most people using these are stage and platform magicians and mentalists. No instructions....Professionals know how to use these..Thanks