The Faber-Castell Tk-System Drawing boards offers an unparalleled experience for technical drawing. They're made from high quality plastics which are impact and break-resistant and highly rugged to resist damage from compass needles. The paper clamp comes with quick release functionality and is super-strong, enabling it to hold several sheets of paper securely in place while the parallel rulers allow precise drawing of parallel lines and angles with help from the adjustable drawing heads.