Description Made of durable and sturdy iron material, it can serve you for a long time without being easily damaged. The reasonable design makes it evenly stressed, not easy to skid, and more efficient. It can be used in asphalt concrete roads speeds bumps, strong and durable. Features -Color: Silver. -Material: Iron. -Size: 10.00X2.00X2.00cm/3.93X0.79X0.79in - This expansion bolt is widely used in speeds bumps for driveways, asphalt, concrete roads, etc. - Also applied in driveways building, speeds bumps installation, concrete roads equipment, rail product fixing, etc. - It is in stable characteristics, and high performance of wear-resistant, deform-resistant. - Very practical and sturdy, not easy to deform, giving you a good using experience. - Suitable for using indoor, outdoor even in humid environment, , high rust resistance. Package list: 10 x Expansion Bolts