The Pettom Heavy Duty 2 Way Dog Lead Metal Chain Double Pet Clip Leash Coupler is a high-quality product that is made of the best materials. It is designed to be durable and last long. The coupler features a swivel heavy-duty bolt snap and is tested to exceed industry standards. It is perfect for medium sized dogs. The overall length of the leash includes the chain leash, O-rings, and hooks. The chain is hard-chromed for durability and rust resistance.