Metal Cyrkiel Grand GR-C 100 — precision drawing compass, metal construction

Grand GR-C 100 is a metal drawing compass designed for precision circle drawing and technical drafting. The metal construction provides stability and durability, allowing for consistent needle placement and controlled pencil positioning. The compass is intended for tasks that require accurate radii and smooth arcs, such as school geometry, architectural sketches, engineering diagrams and hobby model work.

Advantages

The solid metal build reduces flex during use, improving repeatability of measurements and the quality of drawn circles. A stable hinge and adjustable leg tension enable fine control of the radius, while the sharp needle point anchors the compass reliably on paper. The design supports both standard graphite leads and pencil inserts, offering versatility across different drawing media.

Suitable for

• School geometry exercises and classroom use
• Architectural and technical sketching
• Engineering drawings and drafting
• Hobby model construction and crafts

Key specifications

• Material: metal construction for legs, hinge and needle
• Adjustable radius range suitable for small to medium circles
• Needle point for firm anchoring on paper
• Compatible with standard pencil leads and pencil inserts
• Fine-adjustment hinge for controlled radius changes

How to use

Place the needle point firmly at the intended center of the circle, then adjust the opposite leg to the desired radius using the hinge mechanism. Insert a graphite lead or pencil into the pencil holder and tighten any securing screw to prevent slippage. Hold the top of the compass and rotate the pencil leg smoothly around the needle, maintaining consistent pressure to produce an even arc. For very small adjustments, use the fine-adjustment feature to set the exact radius before drawing.

Usage recommendations

Use on a stable, flat surface and avoid excessive lateral force to maintain hinge alignment. Replace or sharpen the graphite lead as needed for clean lines, and store the compass in a protective case or wrapped in soft material to prevent damage to the needle and hinge.