Safety in use: The steel needle of the multimeter test probe is very thin and hard, which can easily pierce the cable sheath for testing. There is no need to cut the cable sheath and will not damage the wires. [Durable material]: The probe is made of high-quality copper and stainless steel, the surface is nickel-plated, and the service life is long. There is a 4mm socket at the end of the test probe, which can be used with a multimeter or oscilloscope test line. [Multiple Uses]: The insulation test probe has multiple functions, such as reverse detection, perforation and tip detection. It can also be used as a tip probe when using a small circuit board. [Wide application]: Needle probes are widely used in non-destructive testing of cables such as automobile maintenance, telecommunications testing, industrial field testing, or plug internal testing. -[Package included]: Comes with 1 red and 1 black test probes. Applicable to automobiles, telecommunications, and industry..Items from Sheng Xinshun's shopProducts from KJ's store