Staedtler Ruler Set 4 pieces of Drawing Accessories for design, graphic, examination, geometry, math or painting Ruler STAEDTLER Geometry Set of 4 for Mathematic, Drawing, Design, Studies / Examination etc. 1 Ruler 20 cm / 8 inch 1 Protractor 180' / 9 cm 1 Square 45' degrees 1 Square 60' degrees