The "Ultra Protect" basement window well covers are designed with "Safety" and "Security" for your home and family in mind. These versatile basement window well covers are manufactured using virtually indestructible clear polycarbonate plastic riveted to a continuous structural grade aluminum angle rear support. These basement window well covers will support a minimum of 250 lbs. when properly installed using our patented "SAF-T Lock" Locking System that is included with each "Ultra Protect" window well cover. Installing these basement window well covers over your basement window wells minimizes the risk of persons falling into deep, uncovered, unprotected basement window wells, preventing possible injury. The model RT600 (45 in. x 38 in.) basement window well cover is designed for use over Rectangular shaped Egress basement window wells. Its versatility makes it possible to be installed and trimmed to the profile of any type (steel, plastic, brick, wood tie, concrete etc.) basement window wells. Once installed it can be trimmed to the profile (plus up to a 1 in. overhang around the perimeter) of the window well openings using an ordinary jigsaw with an aluminum cutting blade (8 to 12 teeth per in. blade for best results)to make for a perfect fit window well cover. A patented, solid steel locking system with pull pin release quickly unlocks the basement window well covers (without the use of a tool, required by code) from inside the basement window well.