Description This bump expansion bolt is made of iron, which has strong compressive ability, easy to install on speed bumps, warning posts, and drywall. This bump bolt is specially designed to fixing bump, suitable for various road environments such as parking lots, residential areas, and construction sites. Features -Color:Silver -Material:Iron -Size:10.00X1.20X1.20cm/3.93X0.47X0.47in -Strong material: The iron expansion bolt is designed for durability and strong compressive ability. -Easy installation: The expansion bolts for quick and convenient installation on various road elements. -Widely used: Speeds bumps bolts can be used in warning posts, speeds bumps, parking blocks, and so on. -Versatile application: Suitable for parking lots, garage, construction sites, residential areas, and more. -The expansion bolt is made of iron, thick and serviceable, moderate hardness, can serve for a long time. Packing list8 x Ramps Bolts