Practical tool for efficient workflow The rolling ruler is designed to boost productivity for artists, pattern makers, and designers, helping you work faster and more accurately. Versatile usage for circles and curves The round hole design makes drawing circles and ovals straightforward, providing a practical and versatile tool for a variety of tasks. Clear measurements for quick calculations Precise scales and formulas enable quick, accurate calculations, supporting efficient and consistent drawings. Lightweight and portable design Made of transparent plastic, this ruler is lightweight and easy to carry, improving drawing convenience on the go or in the studio. Key features and benefits Functionality: rolling mechanism supports smooth, controlled motion for precise guidance. Precision: clearly marked scales and builtin formulas facilitate fast measurements and calculations. Visibility: transparent material keeps your work visible underneath for accurate placement. Portability: compact and lightweight for easy transport between workspaces or locations. Material: quality transparent plastic designed for durability and longterm use. Use scenarios Pattern drafting and garment design: use the rounded hole to create accurate circles and curves for pattern pieces. Illustration and design: apply precise circles and guides to achieve clean, balanced compositions. Technical sketching and education: rely on clear measurements and formulas for accurate geometric work and practice.