This Heavy-duty cables are upgraded with clip which has a strong bite force to improve work stability and safety. It can be plugged in without a service power outlet . It is a necessary tool for HVAC training and kit. It is outlet tester, electrical tester, voltage tester accessories. The circuit breaker finder kit is the perfect accessory for your circuit breaker tracker It can replace running 100+Ft of cord and service power, When HVAC maintenance, engineers can directly take power from a disconnect box to complete the work. It has real Ground wire(GND) and alligator clip of high quality material, which guarantees safety when using it. The alligator clips are sturdy and have a lot of tension to hold the wires tightly. Colour: Black Material: metal + plastic Package Contents: 1pcs Circuit Testers Only the above package content, other products are not included. Note: Light and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.