20PCS HEAVY DUTY CORNER BRACKETS - The black corner brackets are made of high quality cast iron, 3-Layers Matte Black finish and smooth surface ensuring corrosion and rust resistance. 50MM STRONG L SHAPE BRACKETS - Package include 20 x Shelf Support Angle Brackets, Size: 50mm x 50mm, Thickness: 3MM/0.12inch, Hole Quality: 4; Hole Diameter: 5MM/0.2inch. STRONG LOADING CAPACITY - 3MM super thicker than other corner bracket on the market; The thicker angle brackets provide greater load-bearing capacity and more durability. ROUND CORNER AND COUNTERSUNK HOLE DESIGN - Round ends and countersunk allow L bracket to be flat after screw are installed, with no protrusions to cause scratches. WIDE APPLICATIONS - The metal corner brace joint is perfect for reinforcing wood furniture, widely used in repairing and strengthening bookshelf, cabinet, wardrobe, furniture, windows, chairs. BRACKETS FEATURE -Made of heavy duty cast iron provides strong loading capacity and rust resistant. -The shelf bracket just need screws to be fixed for easy installation. -Perfect for quickly and easily to reinforce and repairing wooden furniture or other repair objects. -Connecting furniture joint corner board and reducing the noise of shaking. -Widely use in the home, hotel, restaurant, workshop, storage room, factory areas and so on. BRACKETS SPECIFICATION Material: Strong Cast Iron Colour: Black Finished Bracket Size: 50mm x 50mm x 20mm (L x H x W) Thickness: 3mm/0.12inch Mounting Hole Diameter: 5mm/0.2inch NOTE: SCREWS ARE NOT INCLUDED PACKAGING LIST 20 x Black Corner Bracket