The RMK1 kit contains all necessary items to mount one RE3-RX receiver into a 19” rack. The rack ears easily mount to the receiver’s threaded mounting holes using the provided screws. The threaded front flange mount ends of the antenna cables mount into the rack ears and securely mount either the stock receiver 1⁄2 wave antennas, or coax extension cables for remote antenna applications. The plastic socket filler plugs can be used to plug antenna mounting holes if desired.