Received two sets of McKillip pull out drawers. They came completely assembled and I was pleasantly surprised with the ease of installation. All I had to do was remove the drawers and screw the frame. which  had five pre-drilled holes, into the bottom of my cabinet using the five screws provided. Within a half hour I had both sets of pull out drawers installed and had placed everything back in the cabinet.One of the drawers was sticking and not sliding in easily. I just sprayed the runner with a little bit of silicone and it moved smoothly. The quality of the hardwoods and the depth of the drawer boxes we’re just what I was looking for. I would highly recommend this product for its quality and ease of installation.