The center drag box for Patcher II allows fast and easy application of Mastic One for various types of longitudinal repairs – simply attach and drive down the road along the repair. It is available in various sizes ranging from 10 in. to 48 in. wide to cover distresses such as cold joints, shoulder repairs and alligator cracks. It provides a consistent and smooth application of hot-applied mastics quickly and easily, making longitudinal repairs fast and efficient.