powertools - Want to know how hex bit shank works and the history behind it's design - Home Improvement Stack Exchange

I have tried to search this in google but I haven't found a complete explanation, so I ask this here. I also have read other answers related with hex bit socket, but it still not satisfied. How the

powertools - Want to know how hex bit shank works and the history behind it's design - Home Improvement Stack Exchange

Hyper Tough 30 Piece Screwdriver and Bit Set in Click Fit™ Case, 42034CF

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Driven 1/4-in Impact Driver Bit (48-Piece)

Bosch Driven 1/4-in Impact Driver Bit (48-Piece)

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Hyper Tough 30 Piece Screwdriver and Bit Set in Click Fit™ Case, 42034CF

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