Mechanical, air bag, and hydraulic edge-of-dock levelers under Kelley and Serco brands mount to dock face to replace portable plates for moderate traffic. New models have effective working range of 5 in. above to 5 in. below dock. Mechanical activation has ergonomic design to minimize strain; air-powered includes pushbutton operation and lift system that is fully operational at temps of -65 to 180°F. Open lug-style front lip hinge offers superior strength, and EZ-Hang installation tabs simplify install and ensure proper alignment.