【SIZES】The set comes with 12 levelers and T-nuts. The inch coarse thread, 1/4"-20 UNC, is suitable for most American-made furniture. Get details from the second image! Please make sure that the diameter of the furniture feet is greater than 1"; otherwise, there is a risk of cracking during installation; be sure to check your needs before ordering! 【FUNCTION】Furniture leveling feet are adjustable devices attached to the bottom of furniture legs, providing stability on uneven surfaces. They prevent furniture from shaking, enable easy movement of furniture, protect floors from scratches, and reduce noise when moving furniture. Easily solve leveling problems and make expensive equipment useful again. 【MATERIAL】Furniture leveling feet are made of galvanized steel and have a black PP non-slip base. The leveling rails are strong enough and rust-proof. Even under heavy loads, each product can support over 200 pounds. 【EASY TO INSTALL】The inch coarse thread, 1/4"-20 UNC, fits most furniture made in the USA. For furniture legs with 1/4"thread, screw in the leveler for adjustment. Otherwise, pre-drill a 1/3"hole and insert a T-nut, then screw in and adjust (recommended 1/3"or 5/16” drill bit). 【WIDE APPLICATION】They are suitable for a wide range of furniture items such as tables, cabinets, chairs, desks, TV stands, shoe racks, and more. Whether indoors or outdoors, these leveling feet offer versatile height adjustment for tables, chairs, kitchen cabinets, stools, dressing tables, patio furniture, and even restaurant setups. The inch coarse thread, 1/4"-20 UNC, fits most furniture made in the USA. For furniture legs with 1/4"thread, screw in the leveler for adjustment. Otherwise, pre-drill a 1/3"hole and insert a T-nut, then screw in and adjust (recommended 1/3"or 5/16” drill bit).