4 Way Spring Loaded Terminal Connector - Push Type Wire Terminal
This 4 way spring loaded terminal connector comes very handy during testing of a circuit or equipment. One can just connect the lower metal contacts to desired voltage and connect the device to that voltage by pushing the connector lever and insert the connections of the device under test.
For example you have made a lot tube light choke and you want to test all of them one by one by putting them onto mains supply, you can just connect the 2 of 4 terminals of this connector to Mains and each time you can insert the choke connections using spring loaded levers for testing, it saves a lot of time as you do not need to do any soldering or any special connector is not required. This type of connector is normally used with the Audio amplifier sets to connect to different output boxes. One can also use it to connect motor to motor driver boards, no screw or soldering required, just push the lever insert the wire and you have juts made a connection.