A gate that closes by itself is really a must, because a gate that is accidentally left open can be an invitation to enter, it can also allow for young kids and pets to escape, and you don't want that.

• Gate Coil Spring   
• 250mm   
• Galvanised   

A coil spring is a helical-shaped mechanical device that is close-wound or open-wound.    

Coil springs store mechanical potential energy.   

They can be made of elastic materials or metal such as hardened steel.   

You can find coiled springs in many ordinary items - from farm equipment to toys, trampolines and much more.