VDE 2-component flat profile screwdriver - PZ. Specification and advantages of the PZ/FL profile (flat cross Pozidriv). The PZ/FL profile is only useful for connecting screws where flat or PZ screwdrivers have been used so far. These screws have an internal PZ profile with an additional transverse groove, which also allows the use of a slotted screwdriver. In this new screwdriver, the inner profile of the screw has been precisely transferred to the outer profile of the blade. Area of application of Profile-PZ/FL. Mostly, these screws are used in the electrical installation industry for automatic fuses, protection devices and electric shock switches