Hi…..friends here i will show how create a stock vector illustration 3d locker images.
In this tutorial you will learn how to create a locker quick and easy.
[1]-Choose the box and create box with the following size
Now place like me 
[2]-COnvert the box into the editable poly now select the edges
now apply the extrude edges with the good following amount as shown below 
[3]-Your object should like this 
[4]-Create two boxes with the following size and place like me 
[5]-Select the edges and apply the chamfer edges with the amount of 0.31 
[6]-Create chamfer cylinder and place like me 
[7]-Now create a two more chamfer cylinder with the following size and set like this 
[8]-Create another chamfer cylinder and apply the taper modifier with the good following amount as shown below 
[9]-Create two more copy and place like me 
[10]-Again create two more chamfer cylinder and place like me 
[11]-Apply the taper modifier with the good following amount as shown below 
[12]-Apply the edit poly modifier and select the edges mode
Select the edges like me 
[13]-Apply the extrude edges with the good following amount as shown below 
[14]-Your object should like this 
[15]-Make the materials like me 
[16]-Set the skylight like this with the good following amount as shown below 
[17]-Now you are done it enjoy the final output as shown below 