5
Your chassis comes with a small manual, some extra screws, standoffs, tie-wraps and your typical kit really. Here you can also see the tool-free retention clips for optical and HDD drives. Just pop these suckers on and slide it into the drive bay. Really handy.
So here we can see the innards of the chassis. Cables are carefully packaged in a cloth. Likely to prevent damage during transport. The chassis is made out of sheet metal.
So here we can see the lower drive bay for your 3.5" storage goodness. Again you can slide in the drives with the help of the tool-free plastic clips delivered with the chassis.
In the lower compartment of the 5.25" drive bays we see handy tool-free retention clips for the optical drives pre-installed. Really, you just slide them and pop them secure. As easy as counting 1-2-3. BTW if you prefer to do so you can obviously also choose to use standard crews.