KEEP LID STAY OPEN The lid support hinge holds the lid open until you want to close. Similar purpose of a gas strut but doesn't self lift, stays and supports lid where you want it. It's widely usage as hinges for wooden box, such as toy box hinges,chest hinges, also fit for overhead kitchen cupboard,wardrobe lids too.Perfect for any lids or flaps when soft close lid support is required. DURABLE MATERIAL Heavy lid hinge, max weight support 50lbs/2pcs.The up-grated version has the advantages of strong bearing capacity,metal connector instead of plastic clip.Made of premium quality zinc alloy with maximum corrosion resistance and durability the chest slow close hinges guarantee high performance. EASY TO INSTALL ImportantRefer to our install videos ! The lid closer can be mounted on the left or right side, also used for side-mounting and top-mounting. Upward door open adjustable angle of 75,90,110. It can fit for most lids and allow you to keep your lids stay at any angle. Just mark two drilling holes, and screw each mounting bracket. No need to use the diagram on the package ADJUSTABLE TENSION Adjust the toy box hinges soft close tension with Allen wrench to fit for lids with different weight. After installing the lid hinges for wooden box, please tighten the mechanism into Allen wrench hole in the middle of the arms to set up appropriate pressure, prevent lid from slamming shut. CONDITIONED SOFT CLOSING Only with this chest hinges supporting less than 50lbs and keeping two soft close hinges in same tension by your adjustment will soft closing function work perfectly!! The safety hinges will go down slowly, and prevent fingers from getting smashed.