Casino tokens (also known as chips, checks or cheques) are small discs used in lieu of currency in casinos. Colored metal or compression molded clay tokens of various denominations are used primarily in table games, as opposed to metal token coins, used primarily in slot machines. Casino tokens are also widely used as play money in casual or tournament games. Some casinos also use gaming plaques for high stakes table games ($25,000 and above). Plaques differ from chips in that they are larger, usually rectangular in shape and contain serial numbers.