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 carpeting. Comes with 8 high-density felt pads to protect floors from scratches and reduce noise. Adjustable leveling feet feature a sturdy 1.75-inch long steel insert with 3/8-16 thread for maximum support and adjustability. Commercial-grade large base measures 1-3/8 inches in diameter and 1/2 inch thick. Fully adjustable height from 3/4 inch to 1-3/4 inches. Practical and sturdy heavy-duty leg levelers for easy leveling of furniture in homes, offices, restaurants, schools, or cafes. Helps support heavy furniture, raise furniture height, and allows for easier sliding. Provides effective, reliable solutions. Easy installation: pre-drill a hole with a diameter of 1/2 inch and depth of 1-1/2 inches into the furniture leg, then insert the T-nut, screw in the leg leveler, and adjust to desired height. For furniture legs with existing 3/8"-16 threads, simply screw in the leveler and adjust.