After the product came few days I was not able to try it as I was busy. Then one day I thought of using it to fix a mirror on the wall. I took the drill bit, put it in the machine and tightened it with the key. The machine seemed to work fine but then I found that the drill bit has loosened from the Chuck and the drill machine was rotating without the drill bit. I was shell shocked. I again tightened the drill and went to drill another hole again the drill bit has loosened from the Chuck. I do not know what to do now as the return window is already closed. I did not expect such bad product from a reputed company like Bosch. I am feeling like cheated. Never buy this product.