An allen wrench would be a step up from a nail.
I have my originals on chains and use magnets to keep them from dangling.
If I were to make new ones I'd buy the proper diameter metal rod and cut it into appropriate lengths.
Then I'd buy an oversized dowel and cut some short lengths of it.
then you can drill a hole in the dowel and epoxy the metal rod into it.
or stain the wood dowel and then you have an attractive handle on your "keeper peg".
Another quick fix would be to get an appropriately sized bolt and thread a nut or two all the way to the head. That would give you something to pull on to take the bolt out for lowering the roof.