Umpire indicator's are used to record outs, balls, and strikes. Indicators with a fourth wheel are used to record the inning as well. Indicators are also known as clickers. Since pitch calls are always made with the right hand, the indicator is held in the left hand. Homerunmonkey has a good variety of umpire accessories including umpire indicators, umpire plate brushes, umpire ball bags, and mask replacement pads.