Special featuresWith the Makita Quad Driver, it is possible to easily perform multiple tasks with a drill/driver. The drill side creates a quick and clean (countersunk) drilled hole of 2.8mm. Using the black locking ring, the Quad Driver can then be quickly flipped over. With the PH2 screw side, a 3.5mm screw can then be screwed into the material in an instant. At the bottom of the Quad Driver is an Allen key. This can be used to replace the drill with a different diameter or the screw bit with a different fitting in 25mm hex form, if desired.