Super support Adjustment screw, maximum load capacity is 450 kg. Suitable for chairs, sofas, tables, etc. Also used for industrial aluminum brackets and general equipment accessories. Very practical and durable Industrial quality M8 set screws are made of high quality stainless steel and polyamide plastic. They are reinforced with fiberglass. Nickel-plated surface, very durable and not easy to rust [360 rotation] The bottom of the adjustment screw is a ball head structure, which can achieve 360 rotation structure. The screw is adjustable and tilted by 15 to accommodate the vibrations of the screw at different angles. It is suitable for all kinds of uneven floors [Anti-slip function] The bottom of the M8 set screw has an intimate anti-slip design. There are small embossed particles on the bottom, which largely prevents slipping during use and provides you with protection security. Height adjustment The M8 adjustment screw has a thick plastic base and a height adjustment screw. You can adjust the desired height. Can keep furniture balanced on uneven floors