French Linen Cylinder Bite Roll with HandlesRoll Bite Tug Train with the Right Tools. The Roll Bite Tug is built for handlers who want more than a flat tug. Its cylindrical design teaches proper targeting and grip from the start, while holding up to the demands of high drive dogs. Whether youre working a green pup or reinforcing bite strength in an experienced dog, this tug gives you the control and performance you need. Why the Roll Design Works Unlike flat tugs, the fully round shape