Usage Tips:[Safety Level and Heavy Duty] Testing the CAT III 1000V rated current of 20A is safe and very suitable for various voltage meters, such as clamp meters, digital multimeters, and desktop metersTwo PVC insulated wires with two probe heads, made of double-layer insulated flexible material, for a safer and more durable wire Widely applicable Comes with this multimeter test lead kit, suitable for schools, homes, laboratories, and other usage areas Easy to use Plug and play, easy to install, covered with insulated plastic boots for safe use.We use high-quality materials to ensure that the test leads are durable, flexible, and resistant to freezing and heat. It can withstand low temperatures of -68 and will not become stiff in winter. If you have any concerns, please feel free to contact us at any time.