The Scarifier gently perforates the soil to breathe life back into your lawn and promote growth by allowing water and nutrients to reach the soil underneath instead of sitting on top of the surface. The scarifier has four working depths so you have complete control over the lawn health. Incorporating advanced Brushless technology means more power, longer runtime, and a longer life through its friction less motor. Intelligent electronics constantly regulate the motor to balance power and battery efficiency. The ONE+™ 35cm Brushless Scarifier requires 2 x 18V ONE+™ batteries and runs from both simultaneously. The folding handles on the unit make for easy storage in small spaces in your garage, shed, or workshop.