The two pieces of kitchen storage are nice. They are made from stainless steel. The inner 2" plastic ring on the top is to help maintain it stayed strong in that square shape, because the stainless steel container is not as thick. The knives holder and the utensils holder's caps are made with plastic. The plastic upper cap for the knives holder can holds approximately up to 8 knives due to size of the handle of the knives. I even placed front and back arrangements on the same slot of the holder. The knives are bunched up together. The only problem with that is I have to remember what kind of knife I placed in which slot. The height of both the holders are perfect for all my knives set and culinary utensils.
If you have big knives or knives with big handles then this might not be the best choice for you. The spacing are close enough to each other so it may be hard to fit your knives in each section. Overall it works well for what it was intended but if you are looking at this solely for the amount of knives then there may be better options with better spacing. The other components has no real issue though so those works well.