Premium Material: The Triangle Nail is made from high strength steel, ensuring wear resistance, durability, and long term use even in outdoor conditionsWide Application: The Heavy Duty Triangle Nail is ideal for use at parking lot entrances, residential walls, and commercial building perimeters to restrict vehicle access and enhance securityEffective: Designed with sharp spikes to efficiently deter unauthorized vehicles from entering protected areasEasy Installation: These spikes can be flexibly arranged according to specific needs and are adaptable to various terrains, making installation straightforward and easyPackage Includes: 30 Triangle Nails Size Chart: Height from ground to tip 2.5cm/0.98inch Package Includes: 30 Triangle Nails Note: Please allow slightly errors due to manual measurement and different monitors.