High-quality material: Made of high-quality zinc alloy materials and surface chromed, which is not easy to rust, strong and sturdy. Easy to install: The lid stay hinge can be used for right or left hand mounting. The door opening angle can be adjusted at the maximum 75°, 90° and 110° positions. Bidirectional Operation: There are two ways to install, you can install the hinge to turn up or trun down the door of the cabinet. If you want to open the door of the cabinet down, then you need to adjust the hinge direction as the photo, then the direction will change. Adjustable tension: Adjust tension with allen wrench to fit for lids with different weight. After installing the hinge, please tighten the mechanism into Allen wrench hole to prevent lid from slamming shut. Multifunction: Suitable for drop lids or flaps of furniture, kitchen cabinet, cupboard,wooden storage boxes or toy box., Manufacturer: Qrity