The APEM Inc. part 638H is a high-quality toggle switch designed for various applications. With a compact round lever and a durable construction, this switch is built to last. It features a single pole double throw (SPDT) configuration, allowing for versatile functionality. The toggle switch has an ON-OFF momentary action, which enables easy control of circuits. The switch is panel mountable and includes threaded terminals for secure installation. With a voltage rating of 15A 400VAC 25VDC, this switch is capable of handling a wide range of electrical loads. Trust APEM Inc. for reliable and efficient toggle switches.