Westcott Engineers' Protractor Ruler, Dual-Scales Cm and Tenths-Inch, Back-to-Sc

Protractor Ruler, 6", 15Cm, Transparent (W-5)

Engineers' Protractor Ruler, Dual-Scales Cm and Tenths-Inch, Back-to-School, ...

C-Thru Inch/Metric Protractor Ruler, Inch in 10ths- W-8 Engineers Scale

Durable 6-Inch Transparent Ruler with Metric & Inch Scales for Accurate Drafting

Precision 6-Inch Graph Ruler for Classroom and Professional Drafting Needs