horizontally into the bedpost, an eye plate (post plate) is installed on the bedpost. The hooks are installed on the rail, either as surface mount or recessed. Depending on the hardware, the bedpost may require a mortise in order to allow the hooks to fasten to the plate. This is also referred to as a keyhole fastener, especially if the connector is more of a "plug" than a "hook". Bed bolts ("through-bolts"), are a different means of a knock-down connection. A hole is typically drilled through the bedpost. The bolt head is inset and covered with a plug. In the rail, a dowel nut or other type of nut receives the bolt. The springs are made from metal, which are swirled for maximum comfort Safety rails, or cot sides, can be added to the sides of a bed (normally a child or elderly person's bed) to stop anyone falling out of the sides of the bed. A safety rail is normally a piece of wood that attaches to the side rails, on one or both sides of the bed. They are made so that they can be easily removed when no longer required. See also Bed-In Co-sleeping Sleeping bag References External links Mattresses Sleep Human sexuality