The Makita Quad Driver makes it easy to carry out multiple jobs with a drill/screwdriver.
The drill side provides a quick and nice (recessed) countersink of 2.8 mm. Using the black snap ring, the Quad Driver can then be quickly reversed. With the PH2 screw side, a 4 mm screw can be driven into the material in no time.
An Allen key is located on the underside of the Quad Driver. If required, this can be used to replace the drill with another diameter or the screwdriver bit with another fitting in 25mm hexagonal form c.