This is a set of four table legs that can be infinitely adjusted between 20.5 and 29.5 in. The adjustable step distance is precise to 0.8 in. There are 11 locking heights in total, and they can be set from the lowest 20.5 in. to the highest 29.5 in. all at once without the need for additional tools. The entire leg is made of stainless steel tubes with a wall thickness of 0.06 inches, formed in one piece. Both the inner and outer walls of the tubes have undergone electrostatic spraying, resulting in a dense surface free of capillary pores and resistant to daily bumps and knocks. With a static load capacity of 450 lbs. it is suitable for long-term pressure resistance on solid wood countertops, stone countertops or heavy mechanical and electrical equipment. The package comes with a detailed installation manual and instructions, which will enable you to assemble it easily. Applicable height range: 3 ft. 7 in. - 6 ft. 3 in. It can be used from preschool doodling desks to adult standing office heights as children grow. It can also be used as a workbench, dining table, display cabinet base, laundry room folding table, etc. In any scene that requires flat load-bearing and variable height, the original leg frame can be directly replaced. The package contains 4-legs, 32 self-tapping screws and 8-adjusting screws.