This new option allows the ability to convert the standard MationCage Hi-Lo Cable from 4:1 ratio (25% of selected weight) to a 2:1 ratio (50% of the selected weight. The MotionCage was designed with a standard 4:1 ratio which allows for a lower weight ratio and a longer cable travel distance of 188″, making it perfect for functional workouts. However, for those who want their MotionCage to offer more weight, the new Hi-Lo Cable 2:1 Ratio Kit is the perfect option. The kit is only for one column. If you have two columns you need two kits.