HEIGHT ADJUSTABLE:Bed support is 5.9in (adjustable from 5.9" to 8.6"), the bed frame support legs are suitable for most bed frames, which can protect your bed and mattress from damage or sagging EASY INSTALLATION:If the bed frame has holes, align the double holes with the legs for the bed frame and tighten the screw. If the bed frame has no holes, clamp the bed frame with the bed frame legs and the auxiliary plate and tighten the screws MORE STABLE:The diameter of the adjusting screw at the bottom of our bed frame center support is 12mm, which is 20% thicker than other brands, so it is more stable MORE DURABLE:The bed frame middle support leg is made of high quality steel, anti-corrosive and will not rust, we have thickened the tube wall to make it more load bearing. Leg bottom PVC pads are non-slip and wear resistant HARDWARE INCLUDED:4pcs adjustable bed frame support legs adjustable from 5.9in(adjustable from 5.9" to 8.6"). 8pcs 2.48" screws，4pcs supplementary plate Adjustable bed frame legs height adjustable: 5.9in(Adjusts from 5.9" to 8.6"), 7.8in(Adjusts from 7.8" to 10.6"),9.8in（Adjusts from 9.8" to 12.6"） Material: The bed rail support for wooden bed is made of high quality steel, anti-corrosive and will not rust, we have thickened the pipe wall to make it more load-bearing. Leg bottom PVC pad are non-slip and wear resistant. Packing included: 2pcs Height Adjustable from 5.9" to 8.6" Middle Support for Bed Frame,4pcs 2.48"screw，2pcs auxiliary plate. Features: 1.This adjustable bed frame legs is suitable for most of the bed frames. It can protect your bed and mattress from damage or sagging. 2.Easy to install, lf the bed frame has holes,align the double holes with the bracket and tighten the screw. If the bed frame has no holes, clamp the bed frame with bracket and auxiliary plate and tighten the screws. 3.The diameter of the adjusting screw at the bottom of our bed leg is 12mm, which is 20% thicker than other brands, so it is more stable. Tips：Quality Guarantee, If there is any quality problem, please feel free to contact us. Refund or Replacement for any quality problem.