Description This bump expansion is made of iron, which has strong compressive ability, easy to install on speed bumps, warning posts, and drywall. This bump is specially designed to fixing bump, suitable for various road environments such as parking lots, residential areas, and construction sites.-anchor for concrete Features -Color:Silver -Material:Iron -Size:10.00X1.20X1.20cm/3.93X0.47X0.47in -Strong material: The iron expansion is designed for durability and strong compressive ability.-concrete anchors -Easy installation: The expansion for quick and convenient installation on various road elements.-concrete anchor -Widely used: bumps can be used in warning posts, bumps, parking blocks, and so on.-anchor -Versatile application: Suitable for parking lots, garage, construction sites, residential areas, and more.-stainless expansion -The expansion is made of iron, thick and serviceable, moderate hardness, can serve for a long time.- Easy installation: The expansion for quick and convenient installation on various road elements. bumps expansion is very practical and sturdy, giving you a good using experience.-expansion screw Versatile application: Suitable for parking lots, garage, construction sites, residential areas, and more.-expansion Versatile usage: Suitable for many environments such as parking lots, driveways, concrete roads, etc.-expansion concrete wall anchors Quick installation: Expansion anchors allow for effortless attachment to speed bumps.