New Design: the newly designed zigzag-shaped molars can be brushed to pet dog's calculus both horizontally and vertically. Effectively Clean Teeth: according to the features of dog's teeth, the novel designed molar protrusions are zigzag and arranged horizontally and vertically, which can thoroughly clean dog's incisors, fangs and molars when playing the toy, calculus effectively, fully protecting dog's dental health. Healthy Material: this product is made of healthy and bite resistant TPR material, which will not be deformed even if dog plays with it for a long time, this product is suitable to small ,medium, and large dogs in any breeds. Good For: playing with this toy regularly will relive dog's anxiety and improve IQ when they are at home by themselves, preventing destroy from furniture and clothes, it is come true that dogs brush teeth by themselves.