13mm zinc safety chain holder to suit trailers and caravans up to 3.5t (Max Capacity).
Trailers or Caravans over 2.5t require 2 x 13mm Galvanised Safet chain holders.
Safety chains are stamped every 4 or 5 links with the chain rating. A non stamped chain does not meet the Australian Standards.
Whilst it is not essential the safety chain is connected in this manner, it is preferable. Why?
A welded safety chain could become damaged or shortened. It is then impossible to easily replace. The old chain must be cut off and a new chain welded into position.