The Key Wrench dog chew toy is part of the Alien Flex collection. Made with non-toxic durable nylon, this tough toy is easy for dogs to pick up. It provides interesting textures and a delicious bacon flavor that's irresistible to dogs. Spread your dog's favorite treat in the cavity and watch them have a blast. This chew toy will also help keep their teeth clean as they chew it down. Works great for larger sized chewers.