The Earthwise Power Tools by ALM 16-inch corded electric dethatcher with scarifier blade and collection bag ensures your lawn health by loosening up layers of entangled grasses and yard debris. With the dethatching blade there are adjustable piano wire spring pins that adjust from -4.0″ to 0.4″ to effectively dethatch your lawn with ease. The power dethatcher has 5 adjustable depth positions for the ideal working depth in your yard. Included with the dethatcher is a scarifier blade that can be changed out. Use the scarifier blade to put deep cuts in your lawn for water . air . and fertilizer to penetrate deep into the grass. This bundle allows you to clear the matted down debris and aerate your lawn with only one tool. Unlike a gas dethatcher . this corded electric grass rake is planet-friendly because it does not require gas or oil to function.