Lag Bolt kits are used for installation hardware for asphalt or concrete applications. Surfaces where drilling holes is permitted. Lag Bolt Kit contains one lag bolt (5" for Speed Bumps & 8" for Parking Blocks), one shield, and two washers. Orders placed as one per hole. All hardware is zinc plated and are fairly corrosion resistant. If you have any questions or need help deciding which hardware would work best, feel free to contact us.