Ideal for precise measuring tasks, this 30cm ruler is designed with a 35mm wide calibration on both sides, ensuring accuracy from any angle. Whether you're working on a school project, crafting, or drafting technical drawings, this ruler provides the reliability you need. The dual-sided calibration allows for versatile use, making it a practical tool for various applications. With its durable construction and clear markings, this ruler is a must-have addition to any workspace or stationery collection. Stay organized and efficient with this reliable 30cm ruler with wide calibration markings.