Prehung swing doors are standard doors attached to a frame (jamb) by means of hinges. Manufactured by most door companies in standard widths of 16” to 36” Required hardware: Mortise hinges plus a knob, lever, or pull. Lock sets can be added. The following choices of knobs and levers are just a few of the selection available. Crystal levers, lead crystal knobs, porcelain knobs, solid brass knobs, solid brass levers, solid bronze, wardrobe knobs, and wrought steel knobs.