A HEM MARKER THAT'S STRONGER AND NICER-LOOKING THAN IT'S COMPETITORS.THIS ONE IS MADE OF METAL, WITH A DECORATIVE AND STRONG PLASTIC JAR TO HOLD POWDERED CHALK, AND 360 DEGREE SWIVELING WHEELS. IT EASILY ROLLS AROUND THE HEM OF YOUR GARMENT FOR ACCURATE, LEVEL MARKING, AND WILL LAST FOR YEARS. HEIGHT ADJUSTMENT IS MADE VIA A METAL SCREW WITH A BLACK PLASTIC KNOB. THE LOWEST MARK POSSIBLE IS 6" FROM THE GROUND.THIS CONTAINER COMES WITH 15 GRAMS OF CHALK POWDER.