Self-contained attachment aerates turf without reducing mower power. Fits most riding mowers, ATVs and utility vehicles. Plugr Tow Pro measures 45 ins. Reciprocating aerators run by independent 12-hp engine with electric start. Capacity to cover 84,000 sq. ft. per hour at 3 to 4 mph. Single-switch tine disengagement to avoid sprinkler heads without stopping. Indicator lights warn operator of inappropriate speed for successful aeration. SourceOne Management Inc., Denver, Colo.