A triomino is in the shape of an equilateral triangle approximately 1 in (2.5 cm) on each side and approximately 0.25 in (6.4 mm) thick. Each point of the triangle has a number ( From 0-5), and each triomino has a unique combination of numbers (with repetition of a number allowed in the combination). With the six possible end values commonly seen, and with the additional condition that the three numbers do not decrease clockwise, there are 56 unique combinations and thus the standard triomino set has 56 tiles. Larger sets are possible; including 6 as a possible end number would result in 84 tiles. Tiles are most often made out of a plastic or resin that approximates the feel of stone or ivory, similar to most modern commercial domino sets. Numbers are recessed into the surface and painted black. Some "deluxe" sets include a raised brass tack head in the center which assists in mixing up or shuffling tiles, as the tack head reduces the surface area of the tile contacting the table, so tiles move more freely.
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