Well unfortunately I had a complaint about this product. The chuck "wobbles" very strong.
At first I thought that this is an isolated incident.
Therefore retour back to Amazon and money, bought again in the next hardware store and the same machine.
And with the new device? The same error.
Ie: Drills (of Bosch and other brands) eggs at the top by up to 2mm.
From a 6 hole is an 8-person.
Here Bosch has probably saved in the wrong corner. You can see with the naked eye that the drill head is not symmetrical turns.
Ansich a good, ergonomic machine, but unfortunately they do not serve its purpose.
The caulking function has not been tested by me.
But since the same error occurs when two machines, it is a knockout - criterion.
Therefore, only one star. Too Bad.
**************** **************** UPDATE 07/03/2013
Have now bought this again (yes, I have it a third time trying). Apparently really had 2 times unlucky, the new machine works fine, no eggs, nothing! Just for a home renovation in use. Therefore, the star-upward correction! If you have questions you are welcome to leave your comments, I try to respond to the best of its knowledge and belief.