Usage Tips:Premium Material: The Triangle Nail is made from high-strength steel, ensuring wear resistance, durability, and long-term use even in outdoor conditions. Wide 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 security. Effective: Designed with sharp spikes to efficiently deter unauthorized vehicles from entering protected areas. Easy Installation: These spikes can be flexibly arranged according to specific needs and are adaptable to various terrains, making installation straightforward and easy. Package Includes: 30 Triangle Nails Size Chart: Height from ground to tip: 2.5 cm / 0.98 inch Note: Please allow slight errors due to manual measurement and different monitors.