Mchitch 3.5T Uniglide OFFROAD Trailer Coupling - HOW IT WORKS 

3.5 TONNE "Easy Fit' Caravan Automatic Coupler
This by far our most popular model, it replaces just about all other couplings in its weight range, it has a standard bolt hole pattern for ease of fitment. Join the many thousands now singing the praises of this great Aussie invention!
Fully ADR 62/02 tested and compliant.
A super low height of 125mm at its highest point. This is lowest coupling on the market.
*Capable of over 90 degrees of movement on every axis.
The bolt hole dimensions (centre to centre) are a standard size of 185mm x 55mm, can easily be manipulated slightly due to the holes being elongated.
Choose from the options below for the type of weight distributing head you have. Pictured are all the major types.
If you have a standard tow tongue (no WDH set-up)
Choose option 1