23 mm (thickness) × 1

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The manufacturer's documentation explicitly states the use: to screw stainless steel screws together with stainless steel tools to avoid particle transfer and subsequent external rust formation

five sockets

Bit serie 4 phillips 1/4"; PH1x90mm Unit(s):Packet 23 mm (thickness) × 1Product Overview The Wera 851 4 Z Phillips bit PH1 (05059760001) is a Phillips screwdriver bit with a 1 4" hex drive and a blade length of 89 mm (3 1 2"). The bit is part of Wera's 851 4 Z family and is specified for use with holders according to DIN ISO 1173 F 6. 3. Design and Function This 851 4 Z PH1 bit is described by the manufacturer as a "tough" bit for Phillips screws, designed for universal use and with a focus on preventing premature tip