Some Myler Cheeks have slots, to fix the position of the bridle and reins on the cheek ring. The top slots are for the cheek pieces to stabilise the bit inside the horse’s mouth and hold it off the tongue when pressure is not being applied by the rider. This gives the horse a much clearer signal and reward. The rein slot gives the rider more leverage so the bit can be rotated onto the tongue to signal the horse effectively with less backward pressure on the reins.