The JBI aerator has tines that have a slight twist in them (as well as being offset) which cracks the ground in a sideways and downwards motion, allowing water, air and nutrients to move readily through the soil profile making them more available for plant roots.
Has double rollers allowing for the machine to be angled for more aggressive cultivation. Adjustment between 0 & 10 degrees.
This machine has been hired out a couple of times reducing the price from $10,800