Roller hockey is a form of hockey played on a dry surface using wheeled skates. The term "Roller Hockey" is often used interchangeably to refer to two variant forms chiefly differentiated by the type of skates and sticks used. There is traditional "Roller hockey" (Quad hockey, Rink hockey), played with quad skates, and "Inline hockey", played with inline skates. Combined, roller hockey is played in nearly 60 countries worldwide. A minor variant of roller hockey is called skater hockey, played on both quad and inline skates.