Pre-drilled for side mount, polycarbonate plugs included. Reinforced cast iron hand-hole cover with ground screw. Easily secured base cover. PSS5SVTZ Single Vertical Tenon Included. Conforms to ASTM-A 500 Grade B:minimum yield strength of 46,000 PSI. Bronze Polyester powdercoat finish to ensure maximum paint adhesion. Baked to ensure maximum hardness and durability.