Assuming you are asking about the strongest dog tie out available:
The Tug-N-Tie Out is made with Kevlar, the same material used in bullet proof vests. It is also weatherproof and rot proof. The Tug-N-Tie Out can be staked into the ground or tied to a tree, fence, or other sturdy object. It has a 10 foot lead that allows your dog plenty of room to roam while still keeping them safe and under your control.