Very sturdy piece of furniture.  Not cheaply made at Al witch was a pleasant surprise.the bolts are the color of the frame so no glaring silver bolts staring at me lol.  The drawers  are made of a very strengthened fiber and do not cave in at all with weight.  Strong  drawer bottoms are same material as drawer wrapped in thick cardboard I’m guessing.  That’s it.  Easy to assemble but make sure your drawer stops are lined up with top scroll or you’ll be redoing your shelves to face in the right direction.  Directions that came with it need help in my opinion but hey, I’m a 62 years old lady recovering from a stroke .  Happy days to you all.