Application: The 2.3" Diameter super heavy carbon steel bed risers fit college dorm square wooden bed frames, Tables, this bed lifting square Risers Adjustable to 3.2",5.1",8.1"or 11.2" Heights.Not only provide extra height for bed frames ,but while still keeping your room feeling spacious and open!Load bearing is better and safer: the maximum bearing capacity of our four bed risers is 9000 pounds, more than twice that of standard plastic and cheap bed risers.Our bed riser is designed to completely enclose the post of the bed, which can effectively prevent the bed from sliding, while plastic and cheap bed riser may cause the bed post to slide.Super stable: There are 4 locking screws on the top of the bed riser to lock the bed feet from shaking. Plastic underlay is used at the bottom of the riser to prevent abrasion of the floor.The sturdy carbon steel construction of risers will meet and exceed your expectations. With high quality welded construction and strong metal materials, tall bed risers can hold up to the wear and tear of daily use for years to come!Easy to Install：The bed riser are simple in structure and easy to install. When you need to adjust the height , directly use the eye bolt to align the holes of corresponding height, put the type R locking pin to eye bolt.Then use the plastic hand knob tightening screws to fix it.Note: Your bed post must be a college dorm, wooden bed post ，or Square table legand it must be 2-3.1" in diameter.All Standard College Dorm Bed Posts range from 2-3" in Diameter