Petsmile Professional Toothbrush features a patented 45° brush head with five tufted rows of DuPont® soft nylon bristles better removes debris and bacteria from teeth and gums. The center bristles effectively clean below the gum line where plaque and bacteria accumulate, while the angled side bristles polish and clean the tooth's enamel. The dual-ended easy reach brush head is designed for dogs and cats of any size.