Exit thumbturn CH006 Does not contain an exterior lock piece. Thumbturn is covered by a plastic cover which can be broken in an emergency. Slim design allows instalment on doors with wide a rabbet. Specifications Type of product Escutcheon/rose/handle Close Thumbturn CH021Exit thumbturn for solid doors. Replaces handles. Thumbturn cylinder CH011Thumbturn cylinder. Thumbturn CH005Thumbturn for balcony door latches.