1320LBs Max SupportCommercial quality furniture levelers, T-nuts and thread insert are made of steel that Each leg can support 330LBs, so a set of four can support furniture 1320LBs. Universal DesignAdjustable leg levelers can be installed on tables, chairs, cabinets, workbench, and so much more, universal nylon bottom that work for all floors such as hardwood/tile/carpeting floors. comes with 8 pcs high density felt pad to protect floor from scratches or harsh noises. Adjustable Leveling FeetSturdy 1.75 long steel insert with 3/8-16 thread for maximum support and adjustability, commercial quality large base is 1-3/8" diameter 1/2 thick base and fully adjustable height from 3/4 to 1-3/4. Practical & SturdyHeavy duty leg levelers easy leveling of furniture at home, office, restaurant, school or cafe. It can support heavy furniture well, raise the height of your furniture, and help you slide your furniture easily , to provide you with effective solutions. Easy InstallationPre-drill a hole with a diameter of 1/2" and a depth of 1-1/2" the furniture leg, then insert the T- nut, screw in the leg levelers and adjust to the desired height. for furniture legs with existing 3/8"-16 thread, simply screw in the leg leveler to adjust the height.