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 a 1-3/8-inch diameter and 1/2-inch thickness. Fully adjustable height ranges from 3/4 inch to 1-3/4 inches. Practical & Sturdy: Heavy-duty leg levelers allow for easy leveling of furniture in homes, offices, restaurants, schools, or cafes. Provides stable support for heavy furniture, adjusts furniture height, and facilitates smooth sliding for practical 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 directly.