Heavy Duty Leveling Feet - Made of steel, the surface is galvanized to prevent rust. It can help you adjust and level your tables, cabinets, workbenches, chair, bookcases, etc. It can solve the trouble of shaking furniture and save money, why not try it? L-Shaped Mounting Brackett - This adjustable feet levelers can adjust the height of the furniture from 25/32"(2cm) to 2-3/4"(7cm) and the design of the "L" shape tray bracket perfectly improves the stability of the furniture.(Note: Please refer to the second and sixth pictures for the specific size of the product.) 4000lb Weight Supportt - The weight capacity of each leveling legs is 1000 pounds, and when you use four together, the maximum weight is up to 4000 pounds.These workbench leveling feet can support all the heavy-duty furniture you might own without worrying about its quality.(Note: Ensure that the weight load is borne by the leveling feet, not by the screws.) Easy Adjustment - An electric drill or screwdriver is enough to complete all installations of the product. You can use a wrench to fine-tune the height of each furniture levelers until the horizontal line of the furniture reaches the height you want. (Package includes:4x leveling feet, 16x Installation screws , 1x 4in/10cm wrench.) Quality AssuranceThe base of the workbench leveling feet is made of hard rubber, which has non-slip texture and will not damage your floor. This heavy duty leveling feet is exclusively developed and designed by us, let it completely solve your worries about shaking furniture!