Use this practical wiring aid to connect up to 12 lines each. For example, you can use it to connect street lights or several feeder connections to the track. Terminals 1-12 are connected to each other. Terminals 13-24 are connected to each other. Set screw terminals make connections easy. 84 x 42 x 19 mm / 3-5/16“ x 1-5/8“ x 3/4“.