The Grout Gator design allows the user to simply unscrew each individual grout brush head and slide to match the width of your grout lines. No more mopping right over the grout and leaving all the dirt and grime still lingering deep down. Say goodbye to the days of using your toothbrush to scrub grout lines. No more bending down on your hands and knees with your back aching in pain. The Grout Gator is the first stand up grout brush of its kind.