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Casing:A horizontal or vertical molding, which accents or trims edges of doors and windows to the surrounding walls.
Clad:Provided with a facing or jacket which works as a protection against weather, and provides a finished appearance. Cladding may be painted metal, plastic, or a heavy coating applied by the manufacturer. Provided with a facing or jacket which works as a protection against weather, and provides a finished appearance. Cladding may be painted metal, plastic, or a heavy coating applied by the manufacturer.
Clear Jambs：Natural wood door frames, without paint or primer applied, and which appears to be made of full-length pieces of stock, without joints or knots.
Closer Block：An inside reinforcement, usually placed across the top edge of a door, to enable firm fastening of self-closing hardware to the door.
Core：The center section of a door.
Cylinder Lock：Lock hardware that mounts into a door which has been prepared with a bored hole or holes through the face, and into the edge.
