SEC security covers prevent tampering with equipment; 16-gauge perforated steel; one piece construction avoids use of welded on ears; 1 inch offset to clear knobs; neoprene gasket edges the steel preventing gear from being scratched. Notches for screws allow removal of cover without removing gear. Black baked enamel finish. Please note that the SEC series allows the user an almost perfect view of the secured equipment through 5/32 inch holes.