This screwable deck post anchor is designed to securely support a deck, shed or porch. It represents an advantageous substitute since it allows installation without having to dig or pour concrete. Its adjustable head up to 3 in in height makes it easier to level the floor during construction. Its steel structure and its helical disc ensure its stability and since it sinks more than 42 in into the ground, under the frost zone, it resists ground movements (freezing, thawing). The anchor screw adapts to several types of terrain: it supports up to 5 000 lbs of load in sandy soil and 3 500 lbs in clay soil. For use with 4 in x 4 in square posts. Do not use for fences.Tip: You can use ½ in reinforcing rod to determine if there are rocks or roots in your soil and to act as a guide when installing the screw anchor. Color: Black.