1、HEIGHT ADJUSTABLE SUPPORT LEGS: The height of the legs of this bed frame can be adjusted by rotating the base to select the right height to support the bed frame. (adjustment range from 4.33in to 5.9in) 2、STRONGER SUPPORT: Some mattresses are heavy and without proper center support can cause wood slats or metal bed frames to bend or break. Bed frame support legs provide better support for the mattress and bed. Can support up to 650lbs 3、BETTER MATERIAL: The bed frame bracket legs are made of sturdy hard plastic(PP), thickened material for stable support and strong weight capacity. Furniture legs will not damage or scratch your floors while reducing noise 4、NO SCREWS DESIGN: No screws are needed to install the furniture legs, just rotate the fittings to complete the installation, and then rotate the base to use when finished 5、PACKAGE INCLUDE: Frame center slats heavy support leg come with 2 bed support parts, 2 bases, 2 fixed rings, easy for you to install and use, complete accessories provide convenience to operate