Hi David, It's a Robertson head, Canadian Invention, Great srews, the driver rarely slips off, and the don't need a self grip driver to use in hard to reach places. If you are really stuck, I could send you some at what ever it cost. Roger At 06:50 PM 7/28/01 +0100, you wrote: >Hi folks, > >I wonder if anyone (in the UK?) has come across action screws like these? >I tuned for a new customer yesterday, an old straight-strung upright, circa >1920, pretty standard cheap quality English upright. I took the action >out, and noticed that the flange screws had odd heads. >I pride myself on having every kind of screwdriver - flat, Philips, Torx, >Hex, Pozidrive, Security Torx etc. These screws, however, had heads with >SQUARE holes. Looked like Hex heads at first, but square. A new one on >me! > >Best regards, > >David. > >P.S. I got one out using just an ordinary flat screwdriver placed >diagonally in the hole. >
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