Compass set Penword LINEX 620 — drafting compass kit for drawing and geometry

The Penword LINEX 620 compass set is a drafting kit designed for precise circle drawing, technical sketches and geometry tasks. The set contains an adjustable compass that accepts pencils or leads, an extension facility for larger radii and a fine-adjustment mechanism that enables accurate incremental changes. The construction and components are intended to support schoolwork, technical drawing and basic drafting needs for students, architects and designers.

Advantages

The kit provides controlled, repeatable circle drawing with a fine-adjustment feature that improves radius accuracy. Components are compatible with standard pencil leads and can be adapted for larger circles using the extension option. The design balances stable handling and adjustable precision to assist with geometry exercises and technical sketches.

Suitable for

• School geometry lessons and homework
• Technical sketches and basic drafting tasks
• Architectural and design study work requiring measured circles
• Hobby projects where precise radii are needed

When it may not be suitable

The compass set is intended for hand drafting and educational use; it is not a replacement for industrial or heavy-duty precision instruments used in professional metrology. For extremely large radii beyond the extension capability, or for repeated production measurements requiring machine-level accuracy, a specialized tool may be preferable.

Key specifications

• Main function: adjustable drawing compass for circles and arcs
• Point accepts: standard pencil leads or graphite pencils
• Adjustment: fine-adjustment screw for incremental radius changes
• Extension capability: support for extension arm to draw larger radii
• Typical use: school, technical drawing and drafting

How to use

Place the compass point at the intended centre, insert a pencil or lead into the holder and set the required radius using the main arm and the fine-adjustment screw. If a larger circle is needed, attach the extension arm according to the kit instructions and re-measure the radius. Hold the compass vertically and rotate the arm smoothly around the fixed point to draw an even circle. Regularly check the pencil lead sharpness and the clamp tightness to maintain consistent lines.

What to consider before purchase

• Required maximum radius and whether the extension option covers your needs
• Compatibility with the pencil leads or pencils you plan to use
• Degree of precision needed for your projects (educational vs. professional use)

Usage recommendations

For best results use a sharpened, medium-hard graphite pencil and tighten the clamp securely without over‑compressing the lead. When drawing many circles, periodically check and re-tighten the fine-adjustment screw to preserve radius accuracy. Store the set in a protective case to avoid bending the point or extension arm.