The Onpow M22-D contact block is a robust, reliable electrical device used to connect components in a circuit. It enables simple, direct electrical contacts between two terminals, which are connected either by a spring, an allen key, or by a screw. The contact block can also be used to start and stop circuits, as well as hold them in place securely. It is made from durable, corrosion-resistant material, and is rated for high current levels. It is also designed for ease of use, with a clearly labeled terminal block and a wide-anging operating temperature range.