A home owner from USA says:
May 19, 2014
looking at 3/8 locking clips. current ones are black plastic and keep breaking. can I substitute metal ones? also do you have double wing clips
Paul from SWISCO responded:
May 21, 2014
Thanks for posting. This company used to make die cast clips, but they now use nylon. See our 70-073. Could this work for you?
We used to carry double clips, as well, but the manufacturer discontinued them some time ago.