Where did you get them from and do you have a make / product number? I've never been happy with the straps and would swap them out in a heartbeat. Thanks.
The straps on my Jerry can racks are metal and lock (from Expeditions in Torrance, CA) I know that you didn't direct the question to me, but it's another response and potential resource. I don't use the Jerry can racks but they are what they are.