Rear cage door security

[ellabbs]

Hi. Im welding rear gstes to my gaged tipper to stop stuff falling out of the back whilst in transit. They have long rod type locking bolts,bars .... not even sure what you call them.. but they have like a fork at the top that locates in a reciever thats welded to the top cage frame.. ehen you locate it and push the arm at the bottom it twists in the reciever and locks the gate.

Sorry guys but i struggle to explain what theyre like never mind know what theyre called..

Shipping containers use the same method to secure the doors....

Does anyone know where i can buy a pair please.. or how i can make my own..

I can fabricate/weld etc....
Thanks

Andy