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0-180 Degrees Round Head Rotary Protractor Single Arm 150mm 200mm Two Arms 250mm Stainless Steel Angle Ruler Bevel Square Ruler Steel Goniometer

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Material: stainless steel, precision digital scale ruler
Stainless steel ruler edge have been polished smooth to protect hand use
0-180°Surface useg laser engraving easy read , durable  and precise angle measurement
Three Size: Single Arm: 90*150mm/90X200mm; Two Arms: 90*250mm
250mm Two Arms Protractor has a fixed ruler and a moving ruler
Fixed ruler, double scale. Adjust the Nut, you can fix the angle
Protractor Uses: engineering, angle measurement, student drawing, architectural design, carpentry, length measurement
Material: Stainless steel 
Suface Treatment: Polishing
Protractor Accuracy: 1degree
Size: 90*150mm/90X200mm/90*250mm
Weight: 90*150mm: 85g; 90X200mm: 99g; 90*250mm: 169g
Package includes:
1 * 0-180° Protractor