[Plastic and metal materials] - These adjustable furniture legs are made of high-quality metal and plastic, finely machined, durable and easy to assemble. Wear-resistant, corrosion-resistant and rust-proof. [Adjustable design] - The furniture jack legs have a thick plastic base and height-adjustable screws. Adjustable table legs can adjust the height you need. The height of each leg can be adjusted to 0.79 inches so that the furniture can be placed stably on the uneven ground. [Easy to install] - Installing this adjustable jack leg will be very quick and simple. It features an M6 screw and a round white plastic base. You can combine it with furniture with threaded sockets. You just need to screw them onto the 4 furniture legs. [Widely used] - The leveling feet suitable for office or home, for light furniture with threaded bushings, for tables, cabinets, chairs, desks and other furniture. It also keeps your furniture off the wet floor and keeps the furniture clean and beautiful. [30 pcs foot jack] - The set contains 30 pieces adjustable furniture feet, the size of the threaded rod is M6 x 15mm, plastic base diameter is 30mm, total height is 27.5mm.