Test leads are electrical cables used to connect components in an electronic circuit for testing and troubleshooting. They allow the user to create a connection between two different points of an electronic circuit. Test leads are typically constructed from a variety of conductor materials such as copper, aluminum or stainless steel and are insulated with rubber, PVC or other waterproof insulation. They come in a wide variety of shapes and sizes to ensure that they can make the correct connection to the target device. Test leads are essential for testing and troubleshooting any electronic device, such as televisions, radios, computers, and more.