Protect your floor: In addition to stopping shaking and reducing vibration on uneven floors, the bottom of the adjustable feet is also equipped with high-density thick felt to protect the floor, tiles, or carpet from scratches or harsh noise when moving. Adjustable furniture feet: 1-3/4 inch long steel inserted into 3/8-16inch thread. Large commercial quality, 3/8 inch diameter 1/2inch thick base and fully adjustable height from 3/4 inch to 1-1/2inch for maximum support and adjustability. 1320 pounds maximum support: commercial quality adjustable heavy-duty furniture legs, T-shaped nuts and threaded inserts made of Metal, support over 330 pounds per foot, a set of four supports furniture weighing 1320 pounds! Attention: Please check the size before purchasing to it meets your requirements. Recommended for large or heavy furniture with leg diameters 1-1/2 inches; If it is small, there is a risk of cracking during installation. Easy installation: Pre drill a 1/2 inch diameter hole on the furniture leg, then insert the installation screw into the T-shaped nut (tighten with a hammer), and turn the leg leveler to the desired position to complete the adjustment. If it is a metal leg, you must weld a 3/8 inch threaded insertion first, and then install the flat foot. For existing furniture legs with 3/8 inch -16 threads, adjust the height of the leg by adjusting the horizontal screw., Manufacturer: Duanthry