SETS & SIZES: Package contains 12 furniture leveling feet and comes with 12 T-nuts. Inch coarse thread, 1/4"-20 UNC. Product height is 1"(25mm), screw length is 0.7"(18mm), base diameter is 1"(25mm), and base thickness is 0.29"(7mm). STURDY MATERIAL: The furniture leveling feet are made of galvanized steel and black PP non-slip base, the leveling rails are strong enough and rust-proof. The height of the furniture leveler can be adjusted via threads (1/3" - 3/4") according to your needs. Can support over 200 lbs. FUNCTION: Furniture leveling feet are adjustable devices that attach to the bottom of furniture legs to provide stability on uneven surfaces. Preventing furniture from shaking also allows furniture to be moved easily, protects floors from scratches, and reduces noise when moving furniture. WIDE APPLICATION: Adjustable table legs are compatible with various flooring typeswood, laminate, hardwood, tile, and carpet. They suit a wide range of furniture pieces like tables, cabinets, chairs, desks, TV stands, shoe racks, and more. Whether indoors or outdoors, these legs offer versatile height adjustment for tables, chairs, kitchen cabinets, stools, dressing tables, patio furniture, and even restaurant setups.