Architectural Scale Ruler Set Aluminum Alloy Triangular Scale Ruler Kit Triangular Ruler 3060 and 4590 Triangles Ruler Protractor 4 Pack Math Geometry Tool

?Product Specification? ? Name: 4 Packs Math Geometry Tool ? Package Size: 17cmx8cmx0.5cm ? Items weight: 50g ? Product material: Aluminum alloy ?Product Features? ? Laser etched ensure Never Fade or Rub off during use, Easy-to-Read Laser Etched Increments. ? Strong Durability, can be used for any Occasion, Such as Life, Learning, Work, Experiments etc. ? Whether you're an architect, engineer, student or you just need to make precise measurements or drafting, these well-crafted specialized tools get the job done. ?Set includes? ? 1 Straight Ruler 15 cm ? 1 Protractor 180' / 10 cm ? 1 Square 45' degrees - 6cm x 10cm ? 1 Square 30' degrees - 6cm x 10cm ?Caution? ? Although the sharp corner of the scale ruler are specially treated to prevent injury, it is also Not suitable for children under 3 years olds