A rouletteRoulette is a popular casino table game originating from France. Players place bets on either a single number, various groupings of numbers, the colors red... More diamond, commonly referred to as a “deflector”, is a small, often triangular or diamond-shaped piece that protrudes from the inner wall of the roulette wheel. In addition to “roulette deflector”, these devices might sometimes be called “bumpers” or “canoes” or “pins” in casual conversation, depending on the region.
The introduction of deflectors was likely a response to players’ attempts at predicting the outcome of spins based on the wheel’s mechanical tendencies. By adding these deflectors, casinos ensure greater randomness and reduce the likelihood of players being able to predict where the ball will land based on any perceived or actual wheel biasesIn decision science, bias refers to systematic and predictable deviations from accepted models of rationality. In scientific language, "systematic" and "predictable" are not meant to.... The presence and design of these diamonds might differ slightly from one casino or region to another, but their core function remains the same.