This bookshelf is just right!  I wanted a bookshelf for organizing and storing papers, etc., but didn't want one for in this room which was stationary, as there are already several (lol).  This bookshelf is on wheels!  Perfect for my use because I can move it into the adjoining room with no problem!  This unit comes with two bracing bars, which I didn't feel I needed, and also with pieces to attach it to the wall, if desired.  Also, there are feet which are already attached for those who don't want their bookshelf mobile.  I'm very pleased with this bookshelf, which has many shelves (7 in all) and a box (which was not difficult to assemble) to store office supplies, etc.  A well thought-out bookshelf!