High Quality - The wire piercing probe clip is made of quality stainless steel + PVC material. The probe needle is soild and durable, will not easy to be broken or rust. Practical - The piercing probe looks like a pen, easy to hold and convenient to use, and the piercing clip can complete voltage measurement without piercing the insulating layer, saving your time and effort. Versatile - The piercing clip set can release from insulated wires without piercing the insulation, and can meanwhile measure the voltage. Wire piercing probes can be easily connected with test probe pins. Perfect for wire piercing, and no need to strip off the cables and no damage to the cables. A Must Have Tool - It's really an essential tool set to any mechanic, technician for automotive electrical work; It's also a perfect accessory for your volt/ohm meter; A good addition to any multimeter test leads. And should be in everyones tool box..Items from Sheng Xinshun's shop