Abstract: A flexible line trimmer for cutting vegetation having a rotary drive for swinging a nylon line. A housing with an actuator button on its bottom is connected to the rotary drive. A spool for the line is located in the housing. An actuator mechanism is connected between the button and the spool for feeding the line out in increments when the button is depressed. Also, the housing is connected to a drive shaft of the rotary drive by a cap. The housing and the cap have sidewalls that overlap each other. Lugs are molded to one of the sidewalls, and mating slots in the other sidewall provide a quickly releasable connection of the housing to the cap.