Pluggable terminal blocks are a type of electrical connection device that allows the user to connect two different wires together with a two-contact plug-in. They are typically made with two insulated metal terminal blocks, usually made of Aluminum or Copper and come in a variety of sizes. The user plugs one wire into each terminal block and then connects the two of them together with a two-contact plug-in. Pluggable terminal blocks provide a quick and easy way to connect wires to multiple points in a circuit without the need to cut and strip wires or use tools. Pluggable terminal blocks are one of the most common means of connecting wires in electrical and electronics applications.