Tuf-Mac Stiff-Stay Field Fence is manufactured using a "stiff-stay" design with the Max-Tight Knot. This square knot provides extra vertical strength to the fence by connecting the continuous vertical wire to the horizontal wire. The added vertical strength allows the fence to better withstand impact from large animals. It also makes installation easier and faster because the fence does not fold or bind up. Class I galvanized fence resists corrosion and ensures a longer fence life. The Max-Tight knot provides the strength and rigidity to keep your prized animals safe.