Alvin Professional Triangular Scales

Alvin makes its Architect Triangular Scale from high-impact plastic in a non-reflecting matte finish. Professional quality, smooth tapered edge graduations are machine-engraved to provide precise measurements. Furrows are color-coded. Calibrations: 3/32 and 3/16", 1/8 and 1/4",1/2 and 1", 3/8 and 3/...