Knoweasy Coaxial Compression Tool Kit: Professional F-Type Crimper for RG6, RG59, RG11 Cables - Includes Coaxial Cable Stripper and 20 F Compression Connectors

Get this coax crimper with connectors and then use a 5-1675 mhz splitter to connect all of the rooms. Connect the coax from the router to the input of the splitter. Only get splitters with the ports you need for best signal throughput.