Door and lid stays are devices connected to a lid or a door that prevent it from opening further than a specified amount, typically 90 degrees. Typically this is known as lid support, lid stay, or door stay. Similar to hinges in laptops, these heavy-duty hinges allow virtually any size lid to open smoothly, hold its position, and then easily close with little effort and no additional hardware. Lid stays can support the lids of thick boxes from injuring fingers when closing. There are many types of door stays and lid stays. According to the design requirements, curved box lid stays that are left or right aligned are used. Straight lid stays are most commonly used. Also, door stays and lid stays are available in a hinge type. Torsion hinge types are used for thick lid boxes or chests. Door stays and lid stays are further classified by its material, of which stainless steel and nickel ones are most common, though titanium lid stays are also available. Friction lid stays are also common under the category of door stays and lid stays. Spring hinges and sliding lid stays are also available. Some special features available for door stays and lid stays include lid stays with a soft closing lid mechanism for upward and top-opening flaps with concealed or single knuckle hinges. The materials by which this is made of are a combination of plastic, steel, and zinc alloy with a nickel finish. Gas spring door stays and lid stays are an ideal choice for cabinet doors and lid supports that open upward. Gas spring door stays and lid stays offer a soft and quiet closing, plus smooth motion and stopping. Gas spring door stays and lid stays feature adjustable weight capacity. This feature of gas spring door stays and lid stays counterbalances varying door materials for seamless movement. The main application of door stays and lid stays is for cases, doors, boxes with thick lids, chests, machine guards, trunks, and woodworking hardware. Door stays and lid stays are a good option for play boxes that can be easily handled by children without hurting their fingers.