This Gate Ring Latch from Eliza Tinsley is designed for use with wooden gates and comprises of two ring handles (one for each side of the gate), spindle* (to go through the gate), straight latch, catch and keep, with a durable galvanised finish to prevent rust. 

The ring latch is available with the following latch lengths:
5" (125mm) - £9.95 
6" (152mm) - £10.95 

* The spindle supplied is 90mm in length and can be cut to suit the thickness of your gate using a hacksaw or equivalent tool.