The Invincible Chains  features a classic, top selling toy in a brand new  sizes for puppies and toy breeds! The Invincible Chains used the same patented process that it's larger counterpart is so well known for. This over molded toy has no glue and no seams, a tough natural rubber chain that is perfectly sized for small and toy breed dogs. The Invincible Chains  are durable and flexible--perfect for teething puppies.