Mule Tape Bit Hobble also known as a slobber bar is used on the lower rein rings to limit the movement of the shanks on loose cheek bits and hackamores. They are very helpful when used with snaffles and other broken mouth bits and long shank hackamores. They are 5-1/2 to 6" long and are non adjustable. Premium quality hand braided out of natural rawhide by Martin Saddlery The Company Cowboys Keep. Brand NewUse Mule Tape for Lightweight but heavy duty strength & durabilityNote: These are made from genuine mule tape which is very soft.Martin Saddlery is a top tier maker that utilizes the finest raw materials ensuring beautiful long lasting durability in every item they make. Making them the choice of many top professional horse trainers and contestants.MADE IN USA.