Mounting Hole Dia: 12mm / 0.47";Terminals Quantity: 2. This button switch is made of high-quality materials, with high sensitivity and durability, ensuring a smooth and effortless user experience. It is designed to withstand frequent use and last for a long time, making it a reliable choice for various applications. With a broad application range, it can be widely utilized for switch replacements in cars, motorcycles, electric vehicles, and other vehicles, as well as in various household appliances. It supports ON-OFF operating mode and is not prone to malfunction, ensuring reliable and smooth operation. This makes it ideal for various applications that require consistent and dependable performance. Easy to install in all kinds of electrical engineer.