The drawers are not on rails. They drop/slip off the plastic sliders. Also this cannot handle any weight on top (e.g. a small printer) because it makes the walls of the cabinet bow outward causing more drawer issues. Definitely not worth the headaches. You will want to return it within a day or 2 of use.
This unit is flimsy poorly assembled and unstable. Only two of the drawelock and the locking mechanism is pretty poor. Aside from that it was “ cheap”.
Although this file cabinet is being used for a home office I feel that it could be a little more sturdier than it is. Other than that it serves the purpose of my needs.