This was a Canadian invention by P.L. Robertson in 1908, twenty eight years before the US Phillips screw driver was invented. Early customers included the Ford Motor Company. The design is arguably the beat design, as it is far harder to strip a screw head then the Phillips design. Unfortunately, the US designed Phillips has dominated the US manufacturing market, while the Robertson suffered the same fate as the Canadian Avro Arrow, which was also considered a superior fighter jet in it's time due tompolitical pressures.
The correct name is Robertson.
It is used to fasten and unfasten Robertson screws (square head)
A standard screwdriver would be a common one , usually 6" blade in flat, phillips or robertson.
Kimmy Robertson's birth name is Kim Robertson.
Si Robertson's birth name is Silas Robertson.
Stan Robertson's birth name is Stanley Robertson.
the robertson head screwdriver, has a square end, invented in Milton Ontarion Canada, has the most strength on a screwdriver
Allison Robertson's birth name is Allison Rae Robertson.
Antoinette Robertson's birth name is Antoinette Nicole Robertson.
Britt Robertson's birth name is Brittany Leanna Robertson.
Geoffrey Robertson's birth name is Geoffrey Ronald Robertson.
Monroe Robertson's birth name is Monroe Arthur Robertson.