4Pcs Bed Support Legs, Adjustable Height Metal Bed Frame Support Legs,, 7"-12.5" Adjustable height metal bed frame can match beds of different heights. 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. ? IMPORTANT NOTICE ?: For your convenience, please measure the dimensions of your bed legs at home and ensure that this product meets your required bed leg height before purchasing to prevent any inconvenience caused by purchasing the wrong size. BED FRAME FEET FUNCTION: Queen or king mattresses are heavy, and without proper center support, they may cause wooden slats or metal bed frames to bend or break. The bed frame support legs allow you to add essential support to bed slats or the bed frame itself, protecting your bed and mattress from sagging and damage. This saves you money on bed repairs and mattress replacements. UPGRADED LARGE DIAMETER BASE: Our new bed legs adopt an upgraded large diameter base design, with the base diameter increased to 2.4 inches and a thickness of 0.5 inches. The PVC rubber pad suction cups increase grip strength. This upgrade significantly improves the stability and load-bearing capacity of the bed legs, so you no longer have to worry about the problem of the bed legs being prone to bending or tipping over. ADJUSTABLE HEIGHT BED LEGS: The bed support legs can be adjusted in height by simply turning the base slightly (adjustment range: 7.1"-12.2"). This feature allows for flexible adaptation to different bed frame heights or uneven floors. PLEASE NOTE THAT: for optimal structural stability, we do not recommend using the bed frame with its legs adjusted to their maximum height. EASY TO INSTALL: The bed frame legs have a simple structure, making them easy to install. For bed frames with pre-existing holes, align the double holes with the brackets and tighten the screws. For bed frames without pre-drilled holes, clamp the bed frame with the legs and auxiliary boards and tighten the screws. These furniture legs are suitable for most bed frames, bed boards, sofa furniture cabinets, and other types of furniture. ?: We add an additional set of accessories to each product, just in case you may need them. Furthermore, we have incorporated stainless steel and silicone spacers to prevent slipping and bending of the mounting plate when tightening the screws.