Designed for a traditional masonry fireplace, the Pleasant Hearth Colby Collection Glass Fireplace Doors have decorative cabinet-styling with a 1-piece welded frame and high-heat, powder-coated Sunlight Nickel finish. Constructed for a surface mount, these doors sit outside the fireplace opening against a flat surface and help reduce heat or cool air loss up the chimney by as much as 90% for year-round energy savings. Made of smoked tempered glass, these doors open completely so you can enjoy a full fireplace view and feature easy-catch magnets, easy-grip handles, thick heat-resistant insulation and hidden damper control knobs for airflow control. The fine mesh panels located behind the doors have easy-catch magnets and safety handles and should always be closed and glass doors opened when you have a fire going. Simple to install in 3 easy steps, these fireplace doors enhance the beauty of your hearth and are fully assembled.