Robart Pinchless Training Bit Robart Patent #6449930 A Tom Thumb Jointed bit with the famous pinchless mouth piece which will twist to lay flat against the tongue. A revolutionary idea and design to implement it. Instead of training and working a horse on the basis of creating pain and the anticipation of pain. The patented David Robart bit corrects by pressure and eliminating the pain. Truly a cleaver design. Comes with copper inlay and has sliding cheeks. Size: 5.