Size: Each set contains 12pcs furniture leveling feet and 12pcs nuts; inch coarse thread: M6, overall height: 25mm/1in screw length: 6mm/0.3in base diameter: 21mm/0.9in. In addition, we have a variety of other sizes of adjustable feet to choose. Material & Function: Furniture leveling feet are made of galvanized steel and black rubber base, which is load-bearing, non-slip and long-lasting. You can easily adjust the leveling feet to a balanced height. It also prevents scratching the floor and reduces movement noise. Easy to Install: For furniture feet with existing threads, simply screw the leveling feet into the threads. Otherwise it is necessary to drill a hole of appropriate depth in the center of the furniture foot, then tap in the T-nut (excluded); and finally screw on the adjustable foot to adjust the height Wide Application: Leveling feet are intended for indoor and outdoor furniture with legs larger than 1inch in diameter, such as tables, chairs, stools, dressers, patio, outdoor furniture, restaurant table, etc.. If smaller than this size, there is a risk of cracking during installation. Note: Please ensure the furniture feet size your need before ordering, it is recommended that furniture with feet larger than 1 inch in diameter use this table foot leveler; if smaller than this size, cracks may occur during installation Test