Here I will show you about 3dsmax 3d locker model tutorial.
I have used following techniques shown below in this 3ds max tutorial.

[1]-First of all you will press (ctrl +N) now you will see the new window is open
Click on the Geometry > Standard Primitives > Box.
(Length: 100.0) (Width: 87.0) (Height: 34.0).

[2]-Select the polygon mode with the ignore back facing
Make a selection in the front view and delete the polygons

[3]-your object should like this

[4]-Now apply the Shell modifier with the (Outer Amount: 0.1)
your should like this in the perspective view port

[5]-Again select the polygon and make a selection like this
Now apply the Bevel Polygon and use the following setting

[6]-Your object should like this

[7]-Now this time select the Edge mode and select the all corner edges
Like this and apply the Chamfer Edges with the (chamfer Amount: 0.35)

[8]-Now your object should like this in the perspective view port

[9]-Create a three chamfer box with the following same size
Now set like this

[10]-Create a another chamfer box with the following size
Now set like this

[11]-Now this time create a chamfer cylinder and apply the taper modifier
Set like this

[12]-Create a two chamfer cylinder and set like this

[13]-Again create a chamfer cylinder and set like this

[14]-Create a another chamfer cylinder and apply the Taper modifier
And use the following setting now set like this

15]-Create two more copy of the object and set like this

[16]-Create a two chamfer cylinder and set like this

[17]-Now open the material window and make a materials like this
And assign to the objects

[18]-Now this is final result after render the image

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