Phillips
Cross-head screw designed to cam out deliberately
Episodes
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#5529: 15 Forgotten Hardware Parts Your DIY Kit NeedsA 64-drawer parts bin reveals why you keep buying the same screws twice — and the 15 fasteners worth actually stocking. -
#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.