- Machined from rustproof aluminum material, then anodized for lasting protection.
- For laying out your smallest circles to the large ones (up to 100"� in diameter).
- Arms are precisely aligned with spring tension joints to guarantee accuracy and rigidity for years of continued service.
- The holder accommodates flat or round soap stone and pencils.
- Small and medium models fold to pocket size.
- The Extra Large model can be adjusted tight in the center to eliminate any movement while marking large radius"™s or circles.