Features 1、SAFE MATERIALS: PA insulating sheath, nickel plated steel for clamping teeth, and the rear banana socket is made of brass, which is safe and dependable. 2、MULTIPURPOSE: Can be used for electrical projects, voltage testers, replacement of existing clips on battery chargers for jumper start cables, for cars, trucks, etc. 3、BANANA SOCKET: The rear of the battery clip can be connected to a 4mm banana plug, suitable for electronic laboratory work and electrical projects. 4、EASY TO USE: Clip has an arc design at the top and bottom of the press, which is easy to use and has a full clamping force, it is mostly used as a wire test clip. 5、SIMPLE INSTALLATION: 600V‑1000V/10A insulation test clamp, 20mm opening size, insert a banana plug and connect to corresponding equipment for use. Specification Item Type: Insulated Test Clamp Material: Steel, PA, Brass Opening Size: Approx. 20mm/0.78in Model: J.60041 Package List 1 x Insulated Test Clamp