The rubber nipple on top of the pen is good for iPad and Surface Pro, without smudging the screen. Bolted to the nipple from, one has a bit holder, including two-sided bit small cross and Schlizschrauben (2mm). The spirit level works pretty well. There are three metrical graduated scales (m / = 100 cm, m / m and 200/300) on 10 cm length and 4 inches long scale. And of course, a twist-pen refill. And since the pin is hexagonal, it does not roll away.
Well, if it "makes sense" or not, he looks kind of useful and very technically :)
