Classen® Turf & Lawn Renovation Equipment Built to Use and Designed to Last… With over 30 years of excellence in the lawn care industry, Classen turf and lawn renovation equipment has built a reputation as the product to own for lawn aeration, seeding, and care. The Classen turf care line includes industry-leading innovations: • Our popular, patented PowerSteer™ aerator which allows you to turn without lifting the tines out of the ground. • The industry’s first hydrostatic drive sod cutter with infinitely variable speed, plus reverse. • The industry’s first stand-on self-propelled aerator, the Stand-Aer • Our one-pin lock down trailers for aerators and sod-cutters.