Very sturdy pullout drawers. These were somewhat easy to install but I felt a little contorted at times because my shelves do not remove and I was installing these roll out drawers on the top and bottom shelves. I used a drill to screw the screws into the shelf base. For the last two drawers that I installed I did not pre-drill screw holes - I just went for it and the screws went into the wood just fine. The time and effort to install the drawers were well worth.  Now I can access everything without having to get down on my knees and peer into the back of the cabinet wondering what is back there. Wish I had done this a long time ago!