The Williams cheek piece allows for multiple rein positions - the centre ring acts as a loose ring - the bottom ring promotes poll pressureThe Williams cheek piece encourages flexion and helps to prevent drifting. Consideration should be given to horses with fleshy mouths where increased width is necessary in order for the bit to be well accepted. The Ultra Comfy Lock Up has been designed to suit very sensitive mouthed horses. The shape is such that it follows the contour of the horses tongue. The centre joint has been double locked to ensure that the angle over the tongue remains correct, even when the reins are taken up, but it retains the individual lateral aids. The Ultra comfy has a generous curve, to follow the shape of the horses mouth.