Durable construction This large teacher protractor is built for long-lasting use with a hard, wear-resistant ABS structure that withstands frequent handling. Safe and comfortable Designed with safety in mind, it features a smooth surface, rounded edges, and a burr-free profile to prevent scratches in hands and on desks. Suitable for use in any educational setting. Easy to use Educator-focused and lightweight, it enables effortless operation and smooth demonstrations in the classroom. Large digital display Equipped with a large digital readout for clear readings, making it easier to measure and read angles accurately. Use scenarios - Geometry lessons: demonstrate angle construction, relationships, and measurements with a reliable reference tool. - Drafting and design projects: set and verify precise angles during student work and experiments. - Art and science activities: align components, study perspective, and conduct angle-based experiments with confidence.