What are the dimensions of the DWST08225 (DS250) TOUGHSYSTEM Drawer Unit?

The dimensions of the DWST08225 TOUGHSYSTEM Drawer Unit are:

• Width 21.684"
• Height 10.881"
• Depth 13.299"

The inside dimensions of each drawer is approx. (due to small ridges etc.) 19" W X 3.25" H X 10.25"D