The pieces that you gave to hammer in are very difficult to get in the holes and I ended up partially breaking 3 of them and smashing my finger which started bleeding. Once I got past that step it was smooth sailing.  Once the unit is together it was really sturdy and holds a lot. I can see that these will be lasting for a very long time. I purchased two and actually am going to drill them together and put a board across the top to make it like one big unit.