Upgrade your vehicle's electrical system with this set of 5 heavy-duty 12V 40A car relays, model JD-1914, designed to handle high-current switching demands with ease. Each relay features a 5-pin SPDT (Single Pole Double Throw) configuration, supporting both normally open and normally closed circuit applications, making them incredibly versatile for a wide range of automotive uses. Whether you're wiring up lights, horns, fans, or other accessories on a car, truck, van, motorcycle, or boat, these relays deliver dependable performance. Each unit comes pre-assembled with a matching harness socket and color-labeled wires, so you can identify connections at a glance and minimize wiring errors during installation. A built-in metal mounting bracket makes securing each relay to your vehicle straightforward and hassle-free. Built to withstand the rigors of demanding environments, these relays offer reliable, long-lasting operation. The set of 5 ensures you have spares on hand for multiple projects or future repairs.