2 ms·
As an American, I see flat head screws quite often (but also philips).
by javert 16y ago
As an American, I see flat head screws quite often (but also philips).
- weel 16y agoRobertson screws are not flat head screws. They are a type of screws that is particularly popular in Canada and that requires a square screwdriver. Look it up on Wikipedia... it's an interesting tale of intellectual property guarded too zealously for the inventor's own good.