Hard wearing and with the triple action (twist, lift, open) they are pretty much impossible to undo accidentally.

30kN full strength.

Various gate options are available with screw gates being the most popular.

Quicklock is DMM's double action gate, a single twist and the gate is able to open. Locksafe is DMM's most secure, triple action, gate design requiring a twist and lift before the gate is able to move open.