On Wed, 24 May 2017 20:15:33 +0100, charles wrote:


Pozi heads - the actual indentation on the screwhead, bits and
screwdrivers come in 3 sizes.

0, 1, 2 & 3. I have all of them. The biggest was for a car door catch.

PZ4 also exists

http://www.screwfix.com/p/erbauer-im...ack-of-3/19364

https://www.distrelec.de/en/screwdri...200/p/30035131

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