Key DetailsMaterial: It features a chrome-plated polished metal dome coupled with a black composite or plastic handle.Mechanism: Inside the metal dome, there is a small metal swinging clapper that strikes the sides to create a loud, sharp ringing sound when shaken.Common Uses: These bells are primarily used by teachers in classrooms to grab attention, as service call bells at reception desks/hotels, for summoning assistance in healthcare environments, or as dinner alarms.