Jogging Aids keep your hands away from the blade of cutters, while jogging paper against the back gauge. The heavy duty straight edge provides a better squaring that using your hands. A Cutter Safety Jogging Aid is an easy way to ensure complete operator safety when using a cutter. They replace the need to jog and align paper and products with your hands, which would put fingers dangerously close to the blade. The all Wooden Safety Jogging Aid has no metal screws, so there is no need to worry about damaging the blade of your cutter when using a block aid.