The 30 cm Stainless Steel Ruler is a durable measuring and drawing tool for classrooms, offices, studios and light workshops. Its metal body offers better resistance to bending, cracking and repeated handling than ordinary plastic rulers. Specifications: approximately 30 cm measuring length, centimetre and millimetre graduations, straight metal edge and hanging hole where applicable. It is suitable for mathematics, technical drawing, document layout, craft work and general measurement. Users should handle the metal edge carefully during cutting-related applications.