360° Double Scale Protractor with 30cm Diameter Ruler
Key Features:
- Full 360° Measurement Range
Accurately measure and construct angles in any direction (0-360°) with dual inner/outer degree scales for versatile math, engineering, and design applications.
- Integrated 30cm Transparent Ruler
Combines a large-diameter protractor with a precision-calibrated ruler on a single shatterproof acrylic sheet, enabling simultaneous angle plotting and length measurement.
- Ultra-Durable Construction
Crafted from 3mm thick optical-grade plastic for scratch resistance and long-term clarity. Withstands frequent classroom or workshop use without warping.
- Enhanced Usability
- Non-Slip Grip Edges: Textured borders ensure stability during drafting.
- Laser-Etched Markings: High-contrast black/red scales resist fading.
- Radians Conversion Guide: Secondary scale for STEM/trigonometry calculations.
Technical Specifications:
- Material: BPA-free transparent polycarbonate
- Dimensions: 30cm diameter circle + 30cm ruler extension
- Scales: Dual-degree increments (1° precision) + centimeter/millimeter ruler
- Compatibility: Works with dry-erase markers for temporary annotations
Ideal For:
- Geometry classes & university-level technical drawing
- Architecture blueprints & mechanical engineering diagrams
- DIY projects, quilting, and woodworking angle layouts
Package Includes:
1× 360° Protractor-Ruler Combo
1× Quick-Start Guide (with angle calculation examples)
1× Protective PVC sleeve for storage
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This all-in-one tool eliminates instrument switching, offering unmatched efficiency for precise angle measurement and straight-edge tasks. ASTM International compliance ensures measurement reliability for academic and professional use.