It could hardly be easier!
Just slip each leg of your bed into one of these bed lifters, and you've added an extra 3 1/2" in height to make it easier to get into and out of bed - and to add storage space. To gain even more room, stack with an additional set for a total of 7" in extra height. Each bed lifter supports up to 300 lbs.; 1200 lbs. for a set of 4. Rich mahogany stain on solid wood. 4 1/2" Sq. x 3 3/4"H. You get a set of 4.