Thatch that! When your Dethatcher Joes dethatching power slows, its time to replace the tines to get your Dethatcher Joe back into action. The replacement cylinder features 24 spring steel tines that stay sharp longer and provide maximum aeration performance. Installation requires just a few simple steps to get your dethatcher back into top raking form. In no time at all, youll be back to dethatching 14 inch wide x .5 inch deep paths to keep your lawn green and healthy.