Drafting Compass Rystor CK-03 green — precision drawing compass, spare lead compatible

Rystor CK-03 green is a precision drafting compass designed for technical drawing, school geometry and general drafting tasks. The compass features an adjustable leg spread to set circle diameters accurately and a fixed needle point that provides stable pivoting on paper and drafting boards. The instrument accepts standard spare leads, allowing quick replacement to maintain consistent line quality during extended use.

Advantages

The tool combines a simple, robust construction with precise adjustment for repeatable circles and arcs. Its compatibility with common spare leads reduces downtime and running costs. The needle pivot and adjustable hinge deliver controlled movement for accurate drafting, while the green finish makes the instrument easy to identify among drawing supplies.

Suitable for (tasks / use cases)

• School geometry exercises and classroom drawing
• Technical sketches and mechanical drafting
• Diagram and chart construction
• Architectural detail sketches and layout work

Key specifications

• Colour: green
• Adjustable leg spread for variable circle diameters
• Fixed needle point for stable pivoting
• Accepts standard spare leads for the pencil arm
• Suitable for paper and typical drafting surfaces

How to use

Set the desired radius by adjusting the leg spread and tighten the hinge to maintain the setting. Insert an appropriate spare lead into the pencil holder and secure it. Position the needle point at the intended center, apply gentle downward pressure on the pencil arm and rotate the compass smoothly to draw the circle or arc. For repeated diameters, use the same hinge setting and verify the lead length before each use to ensure consistent line thickness.

Usage recommendations

Store the compass in a protective case or pencil box to protect the needle and pencil point. Replace worn leads with compatible standard leads and avoid forcing the hinge beyond its adjustment range to preserve precision.