Part II: Table Game Cheating · Dice & Craps Cheating Methods
Dice Shell (Expanded Die Shell)
How it works
An elaborate device consisting of a hollow shell that fits perfectly over a legitimate die. The shell contains the desired number on its face and is designed to fit so precisely that it appears to be a normal die. The cheat can switch a die by simply placing the shell over the legitimate die, changing its displayed number instantly. In craps, this is sometimes called “The Craps Cooler” - a complete rigged layout and equipment set that can be switched into a game. A cooler may include matching gaffed dice, a rigged stick, and other equipment.
Where it appears
Historical Casino Craps, Private Games
On the record
In the early days of casino craps, before standardized procedures, “coolers” (complete rigged equipment sets) were a significant threat. Modern casino procedures and surveillance have rendered these largely obsolete.
Detection & preventionADVISORY
The paid halfHow a monitoring room catches dice shell (expanded die shell), and what stops it recurring, written for the desk, not the reader.
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Published as a detection reference for surveillance, compliance and gaming-operations professionals. Thresholds and tuning are set by the property. Nothing here is instruction: the method is described so it can be recognised.