HEIGHT ADJUSTABLE: Leg height can be adjusted with swivel base to accommodate uneven floors; unadjusted original height is 3.15 inches, total height is adjustable up to 4.72 inches; please check the size information before purchasing to make sure the size is exactly what you need ENHANCED SUPPORT: Some mattresses are too heavy to provide the necessary center support for the mattress, preventing the bed board or metal bed frame from bending or breaking, prolonging the service life of the bedding; it also effectively protects the bed frame/wooden slats/platform bed frame from sagging and damaging; save your money on bed repairs and replacements UPGRADED BASE DESIGN: The base of our bed leg has been upgraded and improved, compared with the ordinary bed leg, our bed leg base is wider and thicker, with a larger force area and stronger load-bearing capacity, and the bottom is equipped with a high-quality rubber pad, which is non-slip, noise-reducing and protects the floor Simple installation: no need for complicated steps, prepare screwdriver and screws, select the mounting position, align the screw holes and tighten, manually rotate the base to adjust the height, you can complete the installation in a very short time MULTI-PURPOSE APPLICATION: This adjustable support leg is not only suitable for beds, but also for cabinets, sofas, tables, footstools, chairs, TV stands, nightstands, love seats, sofas, desks and footboards, closets, bathroom cabinets, dressers, bookshelves, coffee tables and bookcases, or other DIY furniture for the home This 4-piece adjustable height bed frame/board center support leg is made of high quality metal material, sturdy and durable. The height of the bed legs can be easily adjusted from 3.15 inches to 12.2 inches with the swivel base, adapting to all kinds of uneven floors and ensuring the furniture is firmly placed. Designed specifically to provide essential center support for mattresses, it effectively prevents bed boards or metal bed frames from bending or breaking due to gravity, prolonging the life of the bedding while saving on repair and replacement costs. The base has been upgraded and improved, wider and thicker, with a larger force area and stronger load-bearing capacity, and the bottom is equipped with a high-quality rubber pad, which effectively prevents slipping, reduces noise and protects the floor. The installation process is simple and convenient, no need for complicated steps to complete the installation. In addition, this bed leg is not only suitable for beds, but also for cabinets, sofas, tables and other furniture, to meet the diverse needs of your home DIY!