• 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.

#72810 (X-Large 50″ span = 100″circle)