Similar to a 13 Pin to Twin Electrics Conversion lead. The can be used when you have a 13 pin electric socket fitted on your car but you need to tow an older (Pre 2008) caravan which has twin sockets fitted. This is neater and more compact than a conversion lead, but you need to make sure that the 13 pin plug on your car is sat in a horizontal position, and that there is enough clearance from the towbar neck to allow for the twin sockets.