The 12" x 30" double overshelf, made of food-grade stainless steel, is perfect for home use and public places, such as bakeries, restaurants, factories, workshops, etc. Two shelves (the lower one is adjustable) can add extra storage space to a work table for organizing your stuff in tidy order. The well-performed bearing capacity of this over-shelf is reflected in that the top shelf can hold 440.9 lbs and the lower 286.6 lbs. Moreover, it is easy for you to assemble and clean. Installation tools and accessories are included in the package, and the stainless steel material is convenient for you to wipe the dirt off without causing damage to its surface.