they offer more steadiness towards the utilized drive as compared to the Phillips screws. The distinction between a Phillips screw and a posidriv might be recognized by wanting them from facet. you can find ribs in between every one of the four arms with the posidriv and therefore are marked by ‘pz’. The hex drive will allow the use of sockets

In this group usually there are some screws which require distinct kind of screwdriver for their installation. at the very least 1 mechanical means of briefly Keeping a slotted screw to your matching screwdriver is available, the fast-Wedge screw-Keeping screwdriver, first created because of the Kedman business within the 1950s.[six] when tamper-