hi to all , am doing my ENGG ,and we have this subject called Auto CAD ,we need to do all this drawing stuff youi know like a screw , a wrench ,gear shaft and stuflike that , so i waqs trying to take the easy way out and want to know if any pre made drawing if present some where to help me in further improving my drawing .

tried googling it ,but it did not help. may be of of you is an engineer and too faced the same problem ,
plz help!