[adjustable chair leg width] you increase the height of the furniture by 100mm, the table leg extension is suitable for table legs with a square or rectangular leg thickness of 0mm - 50mm (0~ 4 inch), please measure the size of the furniture leg carefully before [hard plastic material] The adjustable furniture lift is made of strong hard plastic and aluminum alloy. These furniture lifts are extremely and can easily lift up to 5,000 pounds. It is ideal not only for lifting beds and mattresses, but also for lifting bedside tables, sofas, tables, desks, cabinets and shelves at home and in the office to make your leg room more comfortable. [modified screw fixing does not fall] you don't have to worry about the bed lifter falling. To solve this problem, we improved the adjustable bed height with non-tilting movable screw clamps. Adjust the accessories using screw clamps, packaged furniture legs will not fall off easily. The adjustable sofa/BED/table lift is easy to install. [Create space] The extra height not only increases the storage space under the bed, making the vacuum cleaner more flexible. They also allow older people to get in and out of bed more comfortably. Add a height of 100mm to beds, sofas, armchairs, tables, sofas and other heavy solid furniture to avoid shoulder and neck pain caused by low furniture height. [Protect your hard floor ] The bottom of the sturdy sofa legs are designed with felt cushions to protect the floor from scratches. Sturdy, smooth edges reliably support weight and won't create dents or cracks on hardwood or hard surfaces. Protects hardwood, tile and linoleum floors from damage and wear.