Dogs love to chew, and this toy is designed with determined chewers in mind. The Stratos toy features knobbed rubber ends molded over nylon and a textured rubber center for extra chewing satisfaction. It holds 2 ultra thick rawhide treat rings that are 4x thicker than our regular Busy Buddy rawhide rings. The toy diameter is the same as the rings, making it more difficult for dogs to get a tearing grip on the rawhide. This difficulty combined with the ultra thick rawhide rings means this toy will hold a dog's interest for a long time.