1320LBs max support. Commercial quality furniture levelers, T-nuts, and thread inserts are made of steel. Each leg can support 330LBs, so a set of four can support up to 1320LBs. Universal design: Adjustable leg levelers can be installed on tables, chairs, cabinets, workbenches, and more. Features a universal nylon bottom that works on all floor types, including hardwood, tile, and carpet. Includes 8 high-density felt pads to protect floors from scratches and reduce noise. Adjustable leveling feet: Sturdy 1.75-inch long steel insert with 3/8-16 thread for maximum support and adjustability. Commercial-grade large base with 1-3/8-inch diameter and 1/2-inch thickness. Fully adjustable height from 3/4 inch to 1-3/4 inches. Practical and sturdy: Heavy-duty leg levelers provide easy leveling for furniture in homes, offices, restaurants, schools, or cafes. Supports heavy furniture, raises furniture height, and facilitates smooth sliding. Effective solution for uneven floors. Easy installation: Pre-drill a hole with a diameter of 1/2 inch and depth of 1-1/2 inches into the furniture leg, insert the T-nut, then screw in the leg leveler and adjust to desired height. For furniture legs with existing 3/8-16 threaded holes, simply screw in the leveler and adjust.