GRAFF produces screwdriver bits PH1x50 mm. They are shortened for installing both in collet and cam self-clamping cartridges. The bit is made of increased hardness steel with the mandatory sticking of a cross-shaped sting. Tip hardness is 60 HRC. The bit granite is made at an angle of 90 degrees without an additional tooth (unlike a PZ bit). These bits are designed to perform installation works and structural parts with standard and Phillips screws. There is ribbing on bit edges, which eliminates its automatic slipping from a fastener slot.