1. Wide range of uses: Work flawlessly for bookshelf, potted plants, stereo, table, desk; reinforcing a broom cabinet door, smooth joints, seams and cracks. Help stabilise the bed frame, box, construction or repair of furnishings.2. High-quality: The 30 x 30 mm holder is made of high quality stainless steel, durable, waterproof and rustproof. Hand-polished stainless steel, modern appearance and no worry about daily scratches, corrosion and tarnishing.3.Large quantity: Set of 20 corner struts + 40 screws (40 x 40 x 16 mm). Mounting hole diameter: 5 mm. Number of holes: 4 drill holes. Suitable for many uses.4. Easy to install: The screw holes are recessed so that the screws fit flush with the surface of the brackets. L-shaped steel corner strut to reinforce right angle corner joints.5. What you get: High quality products.