Broadstrike is a type of coin error that occurs when a coin is minted outside the collar due to a malfunction of the monetary press. The collar is a retaining ring that establishes the final diameter of the coin just minted and sometimes also impresses the engravings on the edge. When a broadstrike error occurs, the coin expands beyond the normal diameter, sometimes drastically, because the collar is not in the predetermined position at the time of minting. Despite the enlarged size of the coin, the design elements are complete and centered, with a totally smooth edge.