The benefits of using a poly wire tightener for an electric fence include improved security, increased durability, and greater flexibility. With improved security, the poly-wire tightener ensures that the fence remains tight and secure, making it difficult for animals to escape or intruders to enter. The increased durability of the poly-wire fence tightener also means that it will last longer and require less maintenance over time. Finally, the flexibility of the tightener allows you to adjust the tightness of the wires as needed, ensuring that your electric fence is always working at its best. Overall, a poly-wire tightener is an essential tool for any electric fencing system, providing improved security and durability while also allowing for greater flexibility.