In the world of magicians and performing artists who focus on coin effects there is a great debate between expanded and unexpanded coin effects. While it’s true that there are staunch camps on both sides, most experienced coin trick magicians will admit that expanded coin shells are more versatile.
The cut down on a coin shell is what makes all the difference on how noticeable the shell is. Especially if your act calls for some level of inspection. A cut down with a lip can also stick at the worst possible times during a small performance. Though too perfect of a fit and you risk losing track of the coin by touch if it happens to be mixed in with other coins in a particular effect.
This particular shell was designed to work with a standard quarter, and the cut down is impeccable. It’s easy enough to find by feel in a pocket full of other quarters, yet it’s nearly imperceptible for a casual spectator’s inspection.