High-quality materials: Made of sturdy plastic, they offer increased stability, burr-free edges and a reinforced head, which are difficult to break. The optimized geometry in the center ensures the nail is firmly anchored in the ground, while the lower tip is particularly easy to insert. Robust and durable. Durable and weather-resistant: Our robotic lawnmower nails are stable and resistant to weather, heat, rain, UV rays, snow and humidity. They can be firmly anchored in the ground, even in winter and frost. They can be used for many years without replacement, which is ideal for long-term installation. Quick installation: First hook the boundary wire onto the hook-shaped head of the nail. The deep groove in the head prevents the wire from slipping. Then use a rubber hammer to drive the nail into the ground. Thanks to its robust and wide striking surface, the nail can be fixed to the ground quickly and securely. 【Universal size】 Suitable for cables from 0.1 to 3.8mm diameter,