Introduction to Robertson Screws

Reason being that you cannot over torque a slot screw, your screwdriver will slip first With a Robertson you could crush the flange Pre

The square-head screw was invented by P I Robertson, a Canadian, in 1908 It offered a big advantage over the slotted screw head because

slot onlen A self centering bit is faster to locate than a single slot I am personally a fan of the Robertson… The Robertson Screw So next

slot number 1 Use a slot screwdriver with a blade tip width that is the same as the width Square-tipped screwdrivers that hold screws with