These folding shelf brackets are made from iron material, can load up to 170lbs (80 kgs) per pair, are rust-resistant, corrosion-resistant, sturdy, and durable. Incorporating a sturdy welding process, they adopt a triangle structure, and are more stable while also being stylish. Round corners on both ends protect and won't hurt your hands. The hinges lock at 90 degrees. With a Fold button latch, easy to press, simple to collapse, very convenient, and does not take up space. There are seven holes on each arm for screw installation. Use a power drill and/or screwdriver to attach the bracket to the table/surface/wall or any structure you imagine. Great for your bedroom, study room, kitchen, bathroom, closet, laundry room, office, garage,kids room, playroom, balcony etc. Specification: Material: iron Color: White Size: 45CM x 2.5CM x 17CM/17.71"L x 1"W x 6.7"H Hole Diameter: 5mm/6.5mm Thickness: 1.3mm Package Included: 2 Pack folding shelf brackets Finish: Zinc, nickel, tin, chrome plating, powder coating, etc Application: fastening shelves, furniture, and cabinets