Plastic protractor ruler: A durable, plastic tool designed for learning math and quick circle measurements. It helps save time with straightforward use and provides reliable basic geometry functions. Circle protractor: Use to draw radial lines and measure angles. Plastic construction offers lightweight, easy handling and time-saving geometry tasks. Drafting ruler: Specially designed for measuring size, drawing, and design work. Plastic construction keeps it lightweight and easy to handle during drafting projects. Measuring ruler: Small in size and light in weight, this ruler is easy to carry in a bag for use anytime and anywhere. Suitable for office measuring tasks and quick on-the-go checks. Use scenarios: - In class or tutoring: practice geometry and circle measurements with the circle protractor and drafting ruler. - Design and drafting: measure sizes and draft layouts efficiently with the drafting ruler and plastic protractors. - Office and field use: carry the measuring ruler for quick measurements and circle-related tasks on the go.