4x Steel adjusting screw jacks with retractable square ends;Base diameter: 30mm;M8x50mm jack screw (screw according to DIN 558);Maximum admissible load per foot: M8 = 400Kg;Cape in stainless steel and plastic (Polypropylene), screws in galvanized steel;The retractable tip has a steel insert;Floor Protector - this tube sleeve protects beautiful hardwood, ceramic tile, plastic floors from scratches and scratches Adjustable horizontal legs for office or home furniture. Application scenarios - machinery and equipment, fitness equipment, racks, TV stations, tables, cabinets, shelves, beach chairs, table legs, etc. Maintain balance - if the ground is rough or the legs of the product are not good, you can install it at the bottom of the product to maintain balance.Effectively protects moving products from scratches and reduces high-pitched noise Simple installation - for simple installation, each tube insert has ribs, simply align it with the tube before tapping it into the specified position.Ribs provide a solid fit and avoid the need for additional adhesive