4Pcs Triangular Ruler Set 15Cm/6" Aluminum Ruler Geometric Protractor Black

The triangle ruler set is made of aluminum alloy, with high hardness, strong toughness, anti-rust and anti-corrosion, strong and durable, lightweight and reliable. This geometry kit features a high-gloss anodized finish and laser-etched high-definition scale markings that won’t fade, ensuring every line and number is easy and accurate to read with minimal eyestrain. This set of metal rulers includes a straight ruler, triangular ruler and protractor; the diverse ruler types meet different drawing and measuring needs, while the hollow structure enhances portability and usability, effectively boosting your work efficiency. This drawing ruler kit is perfect for professionals and amateurs. It is a must-have measuring and drawing tool for architects, engineers and carpenters, and equally suitable for precise measurements in classrooms, offices and homes. Note: Try to avoid collision of the ruler with hard objects to prevent damage to the scale and affect the measurement accuracy. Please do not bend the folding ruler to maintain its accuracy and stability.