How to Use: Insert the 4mm/0.16in banana plug at the end of the plug and then connect to the corresponding device to use. Specification: Item Type: Insulated Test Clamp Material: Steel, PA, Brass Opening Size: Approx. 20mm/0.78in Model: J.60041 Uses: Widely used in various electrical projects, voltage tester, suitable for all car and truck batteries. Replace the existing clip on the battery charger for the jumper start cable. The car battery clip is easy to use, portable, lightweight, and Suitable for cars, vehicles, cars, etc Basic parameters: Current and Voltage: 600V-1000V/10A Package List: 1 x Insulated Test Clamp Note: Manual measurement, please allow some errors.