The delivery took a long time, the part came from Barcelona !!!!! For use, the fixation of drills was difficult because no Arritierung available. Today drilled with a 3 mm masonry drill bit, to about 10 holes began the chuck dissolve. I wonder what would have been I would have taken a 8mm or even 10mm masonry drill bit in use. For me, an insult something to offer at all, let alone for sale.