360 degree measuring roller provides precise linear measurements with a long, scaled roller made from polypropylene PP. It marks in both inches and centimeters for easy transfer of lengths and lines. The tool also features a rotating protractor for accurate angle measurement and construction up to 360 degrees, making it a useful addition to any sewing toolkit. Materials and design: polypropylene construction offers light weight and durability; long scale with clear, dual-unit markings. Who benefits: professional tailors, sewing enthusiasts, engineers, architects, students, and teachers who need precise measurements and angle calculations. Use scenarios: - Pattern drafting and fabric marking: measure seam allowances, copy lengths, and mark straight lines on fabric. - Angle work for sewing and quilting: set and mark precise angles up to 360 degrees for cuts and layouts. - Educational use: geometry demonstrations and pattern design exercises in classrooms.