Daiwa CS-201A - 2-Position Coax Switch UHF Connectors.
These can be used to switch between one antenna and two radios or two antennas and one radio. These 2-position coaxial switches can handle the power and offer auto grounding of the unused terminal for protection and excellent port isolation.
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1KW CW / 2.5kW (PEP)
Insertion Loss: Less than .2 dB of Loss
Isolation: Better than 50dB @ 300 MHz
Unused Position Grounded
Connectors: SO-239 (UHF-Female)