1.CONSTRUCTION:These Coffee table lifting hardware are made of high quality metal with an antique brass finish and built-in 3MM elastic springs to smoothly lift and close 4KG lids and desktop. 2.MULTIPLE APPLICATIONS:These lid support hinges can provide stable and cautious heavy support. Very suitable for toy chest, storage trunk, dining table w/storage, deck storage box.And replace the old hinges. 3.FUNCTION: Used for lid & desktop support. This heavy-duty spring hinge can prevent the lid from suddenly closing and provide a gentle closing. It can bear about 4KG, and has super bearing capacity. 4.HOW TO INSTALL: Install 1-Position the U-shaped part of the mounting bracket (with the exposed part of the spring facing downwards), and install 2-Place the U-shaped part of the bracket (with the exposed part of the spring facing upwards). (Left and right hinges) Note: Due to the light and screen setting difference, the item's color may be slightly different from the pictures. Please allow slight dimension difference due to different manual measurement. Sold by-YJL official store