Robart Pinchless The Reiner Bit Robart Patent #6449930 The Reiner is a great bit. Excellent for the transition from snaffle to ported bit. Work each side independently or pull both reins and its a stiff bit. (contains Robart internal bushing) Does not jar in horses mouth preventing the side head tossing caused from jarring. One of the top sellers. Size: 5, or 5 3/4 A revolutionary idea and bit 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 correct by pressure a eliminating the pain. Truly a cleaver design.