Buyer beware. 
The "2inch Screws" are more like 2''1/4. Pre-drilled holes are not drilled fully for the size of ANY of the screws. 
The Corner pieces (#1) has no predrilled holes at all on either side for the pieces #17 and #18. 

I had to go out and BUY screws 2" for the piece as well as an actual drill to 'predrill' to put this together.

the piece looks good; but have On hand the hardware and be prepared to actually do drilling to make it work.