The smooth surface of the cabinet shelf has been polished so it does not wear out easily and hurt hands. 𝐍𝐚𝐫𝐫𝐨𝐰 𝐒𝐩𝐚𝐜𝐞 𝐒𝐭𝐨𝐫𝐚𝐠𝐞 𝐒𝐨𝐥𝐮𝐭𝐢𝐨𝐧: Our Slim Trays Holder is fit for small spaces.