The Forked Abrasive Branch can be attached to the cage at any point. If attached to one of the sides of the cage, it becomes a horizontal branch that they can sit on and climb on. The more they use it the more the abrasive surface will help keep the nails trimmed. Some people hang it down from the ceiling so that they will climb on it and hang on it. That way if they use it a lot, it will have a better effect of nail trimming. They are available in a variety of bright colors. They attach to the cage by a wing nut and two large washers.