ADJUSTABLE TENSION: After installing the hinge, please keep your lid stay in place at whatever angle to need, it will not slam shut when the lid stays open and protect your fingers from smashing. Upward door open adjustable angle of 75,90,110 by yourself. DURABLE MATERIAL: Lid support hinge are made of durable and sturdy Zinc alloy, Only with this hinge supporting less than 50lbs and keeping two hinges in same tension by your adjustment will soft closing function work perfectly. It will go down slowly, and protect your fingers from being crunched. EASY TO INSTALL: Sold In Pairs lid support hinge, only following the placement measurements on the instructions, you can easy to install lid stay. Come with allen wrench and exclusive redesign Installation instruction in package. The hinge is used for side-mounting and top-mounting. WIDE APPLICATIONS: Collapsible shelf bracket is suitable for supporting your bench or table. Such as ones of toy chamber, cabinet, cupboard and window seat, and wardrobe, etc.