Round Bed Risers Furniture Risers – Heavy Duty Anti-Slip Adjustable(1.3" - 3.7" Hgt) Bed Lifts Riser for Desk, Table, Couch, Sofa, Chair, Refrigerator & Washing Machine (3.7 Inch, Black, 4 Pack )

Perfect height and size

I use them upside down to be stable on the rug.

These devices work really well solid well built, don’t slide across the floor.

Amazing product. Did exactly as advertised

Three can screw together, but not all four. However, I used the three together on two sides to elevate the head of my twin bed and with a wedge pillow I have been sleeping better since. You can screw two together for a set of four or use them independently. They are sturdy and support the bed without moving or falling over.

Does the job so far

Don’t waste your money. Whatever you put on these risers don’t stay if there is any movement such as simply sitting down. UGH

Very stable and adjustable, but would like to have a shorter height option.