The long-hole brackets are equipped with screws that can fix the wooden board to the wall so that you can place more items, such as books, decorations and more, and save space for you, perfectly suitable for making bookshelves, storage shelves, garden shelves, and also used to reinforce or repair right-angle connections, such as wooden tables, drawers, cabinets, wooden boxes, etc. Shelf Bracket Parameters: You will receive 4 black 90-degree metal brackets with long hole. The L-shaped corner connector will make your assembly easier and faster. Black metal bracket size: 80 x 40 x 35 mm. The adjustable mounting bracket with screws is compatible with board thickness from 10 to 13 mm Good Load Capacity: The black long hole corner connector is 90° L-shaped, which can be fixed at any desired position to support a strong load capacity up to 10 kg (22 lbs) and maintain stability. These long hole mounting brackets can firmly support the wooden boards on the wall, you don't have to worry about them collapsing under structural loads or shocks or forces Unique Round Design and Adjustable Slotted Holes: Our adjustable corner connectors adopt 2 types of slotted holes - Single round hole and adjustable slotted hole that you can use these 90 degree mounting brackets for different furniture or other objects. The adjustable hole of the mounting bracket with 2 oblong holes allows you to adjust the installation distance according to the size of the slot for more precise installation.