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→Robertson Drive
==== Robertson Drive ====
Square drives have a square shaped socket which has a slight taper as it goes deeper into the screw head. The four 90° angles provide strong torque and decrease the possibility of slippage.
[[File:SquareSquare2.png|framethumb|center|200px|Image reproduced from [https://commons.wikimedia.org/wiki/File:Screw_f.svg here]]]
==== U Drive ====