This product has problems; when you try to assemble it you quickly realize some of the drill holes (especially on the top shelf) are too close together by approximately 1/8 inch. The only way you can assemble this product is to forcibly bend the heavy duty wire retaining pieces until they slide into the drill holes. Even then, "slide" is not the correct word because you have to beat them into place with a rubber mallet: Assuming you are strong enough to do this, once beaten into place the bent- wire retainer pieces will try to spring open; this runs the permanent risk of splitting the wooden shelf into two or more pieces. If that happens this under sink shelf unit will not be a pretty sight!
Some of the drill holes are too close together! Very difficult to assemble.