Engineers' Protractor Ruler - 6-Inch with Dual Scales for Precision Drafting

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

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

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

Transparent Protractor Ruler 6 Inch 15cm for School Office Drafting

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