Keeping lawn edges crisp and neat requires a rotary edger/trimmer in good working order. Teach students how to keep the valuable tool in top shape with the videotape that details proper maintenance, safety and operation. Viewers are shown safety precautions and equipment to wear. Then, they see how to perform pre-operational safety checks, adjust the cutting blade, start and use the trimmer. Routine maintenance techniques demonstrated include greasing the cutter head, washing the air filter, cleaning the housing, checking the spark plug, replacing the blade and changing the oil. A supplement is included.