Easy and convenient to use; Made of good quality plastic; Not easy to break, durable and sturdy; clear color, a clear view of words on the page; measuring range: 2 pieces of 6 inches/15cm plastic rulers and 2 pieces of 12 inches/30cm plastic rulers; dual Side scales:INCH and CM; different measuring range meet different needs; suitable for classroom, school, Office, home, and etc. ; measuring tool for artists, designers, architects, Engineers, students, etc.