Please Measure Your Furniture Legs Size Before Purchase. The risers are adjustable for frame 0 to 2 inches wide. Lift Height 2 inch. Not suitable for any inclined furniture legs 【Adjustable Design for 0-2 in furniture Frames】- The bed risers 4 inch is designed to clamp mounted directly to lock your furniture or bed frames with adjustable screws, so you don't need to damage your furniture by drilling a hole. This furniture risers can be adjusted from 0 inch to 2 inches. You can adjust the gap at will to fit your furniture frame and lock tight by a screwdriver included so that it would't be wobbly 【Not Easily Fall Off & Easy to Install】 - ZDDLOINP risers hold the furnitures frame tightly with the locked screws, won't fall down from furniture legs when lifting or moving the furniture. First, keep the furniture frame clean and dry with the cloth. Then put the furniture legs on the fixed side. Thirdly rotate the long screw to clamp risers tightly to your furniture. 【Anti-Slip and Anti-Damage】- This couch risers are crafted from heavy-duty plastic. These desk risers are strong and sturdy enough to support up to 5000Ibs securely, ensuring furniture stability. The bed risers come with a high density of felt on the bottom, it can protect your floor from scratches and damage. 【Additional Storage Space】- The bed frame risers increase height 2 Inch or 4 Inch you can choose freely by your need. In addition to elevating furniture height, these tables risers provide extra storage space under the bed or other furniture and easy to clean. Moreover, the desk legs risers also help to correct sitting position and alleviate back discomfort. 【Heavy Duty Risers for Multiple Lifting Purposes】- Not only good for raises up bed and mattress, but also ideal for lifting nightstand, sofa, table, desk, cabinet, bookcase and school's art tables at your home, office, school.