Strong Load-Bearing: Made of high-quality zinc alloy, rust-resistant and durable, high hardness and density, can withstand the quality of big Multiple Application Scenarios: for lids or flaps that require a gentle closing action, such as cabinets, cupboards, boxes, etc. Each can be used for right or left hand mounting. By changing the mounting size, the door opening angle can be adjusted at the maximum 75°, 90° and 100° (or 110°) positions By rotating the screw in the middle of the arm, you can fully adjust the different (maximum 42lb) weight to set the correct friction pressure Easy to Install: Our lid stay allows you to keep it installed for 75° and 90° opening. The hinge is used for side-mounting and top-mounting. Mark two points for drilling holes, and screw each mounting bracket into its respective place. Come with installing screws and Allen wrench, Manufacturer: Bohaner