Material Composition | High-traffic drafting environments | Industry: Aluminum (ASTM B209, 2.5mm). Base: Polypropylene (1.8mm, ASTM D638 45 MPa). Advanced: Reinforced polymer (▲2.0mm, ▲55 MPa). | ▲Lightweight (Base: 30% lighter than aluminum). Enhanced durability (Advanced). | Base: Prone to scratches. Advanced: 15% higher cost. |
Angle Precision | Technical drawing requiring 30° angles | Industry: ±1° (ISO 1). Base: ±0.5° (▲ISO 1 precision). Advanced: ±0.25° (▲ISO 0 precision). | ▲Double the accuracy (Base). Military-grade precision (Advanced). | Industry: Risk of misalignment in critical tasks. |
Scale Conversion | Garment pattern making (1:4 scale) | Industry: Single-unit scales (e.g., cm only). Base: Tri-unit (mm/cm/inch) + 1:4 scale (▲ISO 3801). Advanced: Dynamic scale adjustment (▲Customizable ratios). | ▲Multi-unit convenience (Base). Customizable ratios (Advanced). | Industry: Limited to fixed scales. |
Durability & Wear | Workshop use with frequent handling | Industry: Uncoated metal (ASTM B117 24hrs). Base: UV-resistant coating (▲ASTM D523 85% gloss). Advanced: Abrasion-resistant layer (▲ASTM D5264 500 cycles). | ▲Scratch resistance (Base). 2x longer lifespan (Advanced). | Base coating may peel over time. |
Sandwich Line Feature | Aligning multiple pattern pieces | Industry: Single alignment line. Base: Dual "Sandwich Lines" (▲ISO 10360). Advanced: Triple-tiered alignment (▲Customizable spacing). | ▲Precision alignment (Base). Custom spacing (Advanced). | Not available in standard rulers. |
Weight & Portability | Field measurements | Industry: Aluminum (200g/m). Base: Plastic (▲120g/m, ASTM D792 0.9g/cm³). Advanced: Hollow-core (▲90g/m). | ▲Lightweight (Base: 40% lighter). Ultra-portable (Advanced). | Advanced: Less rigid for heavy tasks. |