High-quality materials: The leveling feet are made of high-quality iron with strong bearing capacity, and the surface is sprayed with armored sheath matte tension. It has the properties of anti-wear, durability and sturdiness. Note: The maximum load of this product is 598.7 kg, recommended for large or heavy furniture with a leg diameter of more than 3.8 cm, such as a high table , a side table, a storage cabinet, a chest of drawers and so on. If it is smaller than this size, there is a risk of cracks during installation. Function: Avoid direct contact between furniture legs and the floor, protect the floor, tile or carpet from damage. The height of the four furniture feet can also be adjusted according to your needs, the adjustment range is between 2.5 cm and 5.1 cm. Contains 8 furniture gliders, 4 pieces for using, 4 pieces for replacing after dirt. Installation: You need to drill a hole of 1.27 cm in diameter and a depth of more than 3.8 cm on the furniture leg with an electric drill, then insert the T-slot (tighten with a hammer) and screw in the leg levelers. If it is a metal leg, you must weld a 3/8" thread insert first, then install the leveling feet.