Further technical data and measurement data can be found in the manufacturer's datasheet:

supplied in bags of 4 pieces

It comes as a 1/4" (E6

(stated on the product page)

Bit serie 4 phillips TORSION 1/4"; PH1x50mm Unit(s):Pcs Further technical data and measurementPhillips PH1 screwdriver bit Product 05059805001 is a Phillips PH1 screwdriver bit with a total length of 50 mm, designed for use with Phillips screws. The bit features a built in torsion zone (TZ) designed to absorb peak torque, thereby reducing stress on the tip during momentary high torque impacts. The bit comes as a 1 4" hexagon drive, compatible with Wera connecting series 4 and holders according to DIN ISO 1173 F 6. 3. Description and Function