Compass Divider Beta Tools 1680C/150 — 150 mm precision drawing and scribing tool

Beta Tools 1680C/150 is a 150 mm compass divider engineered for precise drawing, scribing and transfer of measurements. The tool uses a fixed-radius arm configuration and hardened tips to mark circles, arcs and distances on materials such as metal, wood and paper. Its compact and robust construction suits workshop layout, technical drawing and general marking tasks where accurate spacing and repeatable marks are required.

Advantages

The divider provides stable, repeatable measurements thanks to its fixed-radius design and secure joint that resists accidental movement. Hardened steel points ensure durable, clean scribing on a range of surfaces while the compact profile allows easy handling in confined spaces. The simple mechanical construction requires no calibration and offers long-term reliability for routine workshop and drafting use.

Suitable for

• Marking circles and arcs on metal, wood and plastic
• Transferring distances and centers for layout and fabrication
• Technical drawing and pattern making
• Workshop scribing and repetitive marking tasks

Key specifications

• Maximum span: 150 mm between points
• Fixed-radius arm configuration for stable measurements
• Hardened steel scribing points for durability
• Compact, robust metal construction suitable for workshop use
• Single-joint adjustment for secure positioning

How to use

Place one point at the desired center and open the arms until the other point reaches the target radius. Hold the fixed point firmly to maintain the center and rotate the divider slowly to scribe a circle or arc. For transferring linear distances, set the points to the required span and mark reference points on the workpiece. Use appropriate personal protective equipment and ensure the workpiece is secured before scribing on hard materials.

Usage recommendations

To prolong tip life and maintain accuracy, avoid excessive side loading on the points and store the divider in a protective pouch when not in use. For cleaner marks on soft materials, slightly angle the tool and apply steady pressure; for hard metals use a fine center punch to start the mark if deeper indentation is required.