Keeper: Is window hardware that engages with the sweep lock to draw the window sashes together to ensure security and proper weather seal
Kickplate: Installed in one or both sides of a door's bottom rail, polished metal plate is used to protects doors from scratches, dent and soiling of the wood surface.
Krypton gas:Is a gas used in double pane windows, rare atmospheric gas which is odorless, colorless, tasteless, nontoxic, monatomic and chemically inert. Better insulator than even argon gas.
Knocked down (KD): Unassembled window or door unit.