JohnDar
Prolifically Gabby Member
Also know as double square drive. There was a post about finding a bit for them. My rig doesn't have them, but the cargo trailer I'm modifying for the FD does. Tried the #2 square drive bit in one and promptly rounded out the recess. Searched online and no such animal exists as a bit. I was going to replace the roof vent on the trailer, but the manufacturer put it on with a bazillion of those screws. So I ended up just replacing the cap and put a MaxxAir cover on it.