Size: Coarse thread, 3/8-16 size, 0.55"(L) x 1.4"(W) x 2.5"(H). Refer to the second image in the main image. 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 bar table, side table, storage cabinet, chest of drawers and so on. If less than this size, there is a risk of cracks during installation. Installation: You must drill a hole with a diameter of 1.27 cm and a depth of more than 3.8 cm on the furniture leg with a power drill, then insert the T-slot (tighten with a hammer) and screw in the leg levelers. If it is a metal leg, you need to weld a 3/8 inch threaded insert first, then install the leveling feet. Function: Avoid direct contact between furniture legs and the floor, protect the floor, tile or carpet from damage. The height of the four furniture legs can also be adjusted according to your needs, the adjustment range is between 2.5 cm and 5.1 cm.