How to ensure the quality of the test lead?

How to ensure the quality of the test lead?

Finished product inspection: 100% inspection of all products, use a resistance tester and a voltage tester to check the wires, use a tensile tester to check the plug insertion force, use a swing tester to check whether the wires are firmly welded, and use a microscope to check product details for defects. An electron microscope will be used to observe the position of the solder joints to ensure the firmness between the alligator clip and the cable to ensure that the test leads electrical can be used for a long time.