Pozidriv
European cross drive with radial ribs
Episodes
-
#5283: PH vs PZ: The Screw Bit Difference Nobody NoticesTwo cross-head bits sit in every driver set. One was an accident that became a standard; the other was engineered on purpose and almost nobody can ... -
#4143: How Screwdrivers Became a Museum of Bad DecisionsWhy are there so many incompatible screw types? The surprising history of Phillips, Robertson, and the design that won by failing.