1 Unit 16 Inch Carbon Steel Drafting Compass Professional Precision Calibration（)

Forged from premium 45# carbon steel with a lockable wing mechanism, this 16-inch heavy-duty geometric drafting instrument executes surgical, zero-deviation rotational scoring and massive 90cm diameter calibration.

• 45 INDUSTRIAL CARBON STEEL: Forged from superior high-density structural alloys providing an impenetrable rigid core that absolutely resists mechanical shearing and completely outperforms standard A3 steel in deformation resistance.
• OPTIMAL ROTATIONAL SCORING: Precision-engineered pivoting axis translates manual torque into flawless 360-degree kinetic sweeping paths entirely eliminating ragged structural geometric deviations.
• SURGICAL DIAMETER CALIBRATION: Advanced lockable wing architecture allows operators to definitively secure and execute exact dimensional radii up to a massive 35-inch perimeter instantly.
• IMPENETRABLE RUST RESISTANCE: Highly specialized quenching processes and soaked anti-rust lipid coatings guarantee absolute long-term defense against severe environmental corrosion and operational dulling.
• RAPID TOOL FREE MAINTENANCE: Intelligent structural design features an integrated rapid-release holder mechanism drastically accelerating the exchange of standardized marking implements without operational downtime.