Märklin 56081

I 56081 Track Circuit Switch.
Manual switch for interrupting the current in 1 Gauge track. This switch can be attached at a rail joint with an insulated rail joiner.
Dimensions 67 mm x 50 mm x 15 mm / 2-3/4" x 1-15/16" x 9/16".

As is well known, anyone operating his 1 Gauge layout with Märklin Digital or Delta, can stop his locomotive with no problem at all at any spot on the layout and start running another locomotive. With conventional AC power, lengths of track must be set up where the power can be turned on and off. This new track current switch can be used for this purpose.