In some cases, it is convenient to use this tool when the measured point cannot be found and the outer skin of the wire must be broken to test the signal. ETA3404's unique V-shaped slot design ensures that the position of the measuring needle is kept in the cable into the end of the piercing needle, release the button and test the cable in the V-shaped slot. At this time, the sharp needle can pierce the cable sheath directly into the conductor, thus conducting non-destructive testingmiddle of the cable. The 4mm socket at the tail can be used together with the test lead of the multimeter or oscilloscope. It is simple, safe and fast. The use method is to insert 4mm test  of the cable signal. After testing, release the button and remove the wire, the cable sheath leaving pinhole is easy to seal, and high-quality insulation layer can achieve self-healing insulation.

- No need to break the line，nondestructive measurement

- 4mm socket connection

- Insulated wires with diameters of 2 to 4 mm through

- Non-destructive cable testing for automotive circuit testing, power and industry

- Unique V-groove design ensures that the needle is located in the middle of the cable, which is very efficient.