how to perform shell (thickness as "1mm")operation as shown in below figure

Hi friend, you mean in the 3d model? or you mean in 2D??

in 3d model..i already attached that model .while performing the shell operation the whole solid body taking the feature(shell)..

Have you tried with shell command??

yes

I am attaching a picture about the coomand.

i attached a picture and model ..according to the picture i want to use the shell command..if there any posibility make a tutorial for this operation

I'm not sure that I understand you in the correct way.
But if is necessary for You to work with the shell Command, i have a quick and dirty solution.
Should be the Front open?
To get to the weight of 452g, the Insidethickness must be 2.1 mm and the "Thickness.2 must be -12.89mm.