Function: adjustable-height Adjusts from 8"-12" center support leg for bed frame is designed to match different beds' heights to protect your bed and mattress from damage or sagging. The support leg is suitable for bed frame, bed center slat,sofa furniture cabine and other furniture. Easy to install: T-shaped feet, no punching, easy to install. When the bed frame has holes, directly use the bracket to align the double holes and put the screws to adjust the distance, and then tighten them. When the bed frame has no holes, use the feet and the bed frame to place it in a crisscross style, place the counter-piece on the corresponding bracket on the bed frame, clamp the bed frame, put in the screws to adjust the distance, and tighten it. Material: Made form Aluminum Alloy material, Electrophoresis black to prevent rust and corrosion, ensuring a long life and preventing damage to your bed. We have thickened the pipe wall to make it more load-bearing Leg bottom PVC pad are non-slip and wear resistant, won't be harm and scratches to your floors and it has better grip. Hardware included: 2pcs Height Adjustable from 5.1"-9.6" Adjustable Height Center Support Leg No extra trips to the Hardware Store. If you find the product is damaged or missing parts, please contact us for a free replacement.The design is a cost effective way for maintaining the life of your expensive bedbase / Wooden Slat / Mattress Foundation / Platform Bed Frame / Box Spring .The bed frame support legs will hold and evenly distribute the weight of your heavy mattress efficiently protecting your bed and mattress from sagging and damage .Saving you money on bed repairs and mattress replacements.