It consists of a 15mm diameter raceboard sprue and a standard universal axle.
The raceboard mast foot is compatible with: Mistral rail, Bic Hybrid, Fanatic... and many others!
 
The universal axle system (also called North or pin) is mostly used in Europe. Easy to handle, its gives a good connection between the sail and the board. Nevertheless, it must be verified more regularly than a push pin system.