This adjustable support is designed to securely support your patio. It facilitates the leveling of the floor during its construction or its readjustment following ground movements (freezing, thawing). A reliable and efficient solution. Its steel structure provides great resistance and solidity. It is simply installed in a concrete support block or a concrete sonotube. Completely reversible, tilt the base 180 deg. Designed to be used with a 4 x 4 in. Is coated with baked powder paint providing excellent rust resistance.