In order to wire a duplex receptacle, install it in an in-wall box and put the cover plate on requires three, perhaps four or five different screwdrivers. How come there are so many different heads on fasteners in the same commonplace device?
On the occasions that I have worked in the US, (several) I have noted with surprise that square drive screws are not nearly as familiar to American tradespeople as they are to Canadians. The race to patent every conceivable screwhead design was won by a Canadian in the sense that he got the best...
