This is a tool for opening doors and pressing elevators, so it can effectively help you reduce contact with objects and thus reduce the risk of infection with the virus. The tool, during the special period of epidemic, is in order to avoid secondary infection by public transmission. This tool is an empty bottle, you can fill it with disinfectant to help clean what you want to disinfect and isolate bacteria. 4 1/2" x 1/9" x 1 1/6"