Dock Safety Autogard™ Model ATG-3000 Hydraulically Powered to provide a formidable barrier against disasters.   This unique leveler helps prevent vehicles from tumbling off the end of a vacant dock.  The Autogard features an impressive 8" high steel barrier that is hydraulically powered into place as the leveler automatically returns to stored position after use.  No other leveler can match the formidable barrier against disaster that the ATG provides.