The Marlin 30cm Finger Grip Plastic Ruler Range features a highly functional, rigid classroom layout tool framework. An integrated, raised central ridge guarantees easy manual handling and lifting. Highly visible metric demarcations show measurements in centimeters and millimeters. Durable shatter-resistant plastic structures withstand intense daily pencil bag storage. The crisp markings allow high accuracy for school geometry maps. It serves as a foundational mathematics tool for young learners.