1.Safe&High Durability：This is made by natural environmentally rubber and produce with exclusive industrial technic， this dumbbell can sustain with 550 lb of machine pull， durability has approved by Alaskan golden retriever， German shepherd， Labrador and many other aggressive large chewer dogs 2.Unique dumbbell design: Both ends of dumbbell adopting 3D particles design，Hollow ends allow you to put treats like peanut butter， snacks into it to arounse dog's interests， besides， the dumbbell add with bacon flavor，which is better to attract the attention of your dog 3.Multiple benefits；3D particles on the surface of dumbbell could freshen breath， stimulate gums and reduce plaque and tartar， to promote healthy teeth 4.Interactive toys ：Using this interactive dog toys to release anxious& longly mood while your dog is bored and prevent funiture or sofa from damaging， besides， take this pet toy to play throw&fetch games and train your dog's jumping reaction ability. 5.If you have any questions or feedback， please reach out to us， we will get back to you very soon once message received!!!