For the best combination of productivity, operator comfort, superior aeration results, variable hole density and remarkably low maintenance in its class, the PL2501 Ser. PLUGR offers an estimated 30+ percent greater return vs. traditional drum aerators. Best in class controls offer same intuitive, variable speed fingertip hydro-drive innovation as found on the Billy Goat family of hydro-drive products. Proprietary EZ Drop™ tine system has a one-step tine engagement lever from the handle that permits the operator to pass over obstacles in the aeration path for uninterrupted aeration.