Plastic screws allowed?

Hi guys, do you think this set of screws would be following the rules? They say that they are compatible with VEX hardware, but that might just be physically compatible as opposed to being allowed in competition.
The closest rule I could find says that any commercially available screw under 2 inches should be allowed.
Any ideas?

Any commercially available screws are legal

Great, thanks wasn’t sure whether material was counted in there! thanks