Highlight description:[Carbon Steel Material] Our petal nut growth screw is made from high quality carbon metal material, which adopts galvanized technology to augment rust resistance. It has lengthy servicing life, can withstand rust in the marine environment.[Good Load-Bearing Capacity] The jack nuts set is durable and durable, which may face up to frequent use. The larger expansion head can clean and firmly fix on the board and has good load-bearing capacity.[Easy and Safe to Install] The jack nut is easy and safe to install with threaded insertion design. It can set up on the thin or gentle walls with out instruments or equipment. It can make certain securely fixing in place.[Widely Uses] Our multifunctional petal nut enlargement screw can be used with different materials, like plastic, iron sheet, cavity wall and more. It can meet your daily needs, appropriate for DIY or building project.[After-sales] If you've any questions, please get in touch with us, our carrier workforce will provide you with a professional and satisfactory service.Detailed description:Product Name: Petal Nut Expansion ScrewMaterial: Carbon SteelSize: casing inside diameter 4mm, nominal length 20mmColor: SilverNotes:1.There may be slight differences between the image and the particular color of the commodity. We will attempt our best to show you the exact color.2.Please enable slight measurement difference because of guide measurement.Parts List:80-1200 X Petal Nut Expansion Screw