HOW TO CHOOSE SIZE: It is recommended to match the depth of the bulkhead with the length of the bracket to ensure maximum load capacity. Extending the depth of the bulkhead will increase the torque of the support arm. as torque increases, load capacity decreases (lever principle). Models include 200mm foldable shelf supports maximum is 330 lbs / 150 kg To increase load capacity, you You can increase the number of brackets between the doors.SPACE SAVING: The foldable tablet bracket requires only one mounting surface and takes up very little space. You can use them to extend the workbench of the garage, laundry room, kitchen, garage, boat, reception, backyard, RV, grill, trailer, bedroom, balcony, bathroom, etc. Folding it up when not in use saves most space. The package includes the appropriate mounting accessories, high quality stainless steel screws and expansion tubes. You just need to make sure that the two brackets are parallel to each other and perpendicular to the wall.STURDY AND DURABLE: Made of high quality stainless steel with good corrosion and rust resistance. No coating, no painting, easy to clean, wire drawing process, can prevent daily scratches and stay shiny as new.