Temporary Roofing Straps

Quite often builders don’t remove these, claiming they will be useful in the future.
I’m wondering what the useful lifespan of these straps is. I’d google the manufacturer but I don’t know who makes them.

John,

Some fall protection roof anchors manufacturers at link below claims that they will last the life of the roof.
http://www.snugharness.com/Anchors/Roof-Anchors/

http://www.snugharness.com/Anchors/Roof-Anchors/Guardian-Ridge-It-Permanent-Tile-Roof-Anchor/

Hope this helps,

Thanks Marcel.
John