happimess HPM5013A is a shelving unit that is easy to assemble, requiring no tools and taking approximately 15-20 minutes to complete. It is made of durable materials and each shelf can hold up to 66 lbs. when items are evenly distributed, making it suitable for storing heavier items like books or kitchen appliances. The shelves are adjustable and can be placed at different heights to accommodate taller items. The HPM5013A also comes with a hook rail that can be hung on the top shelf for additional storage options.