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Detachable Stainless Steel Round Head Rotary Protractor Angle Ruler Measuring – US$5.84


Specification:
Name: Detachable Stainless Steel Round Head Rotary Protractor Angle Ruler Measuring
Material: Stainless Steel
Color: Silver
Length: 15cm
Angle: 0° – 180°
Size: As picture shown
 
Features:
Made of stainless steel material, high precision, accuracy, durable.
Suitable for wood building, mapping, designing, etc.
For a simple measurement of the angle and length.
The reading of dials 0-180 degrees, foot long strip divided 15cm.
Laser engraving, clear reading.
Angle ruler combined screwing, the screws can be easily disassembled.
 
Usage
1. ZERO: loose screw and to turn handle ruler, then keep the handle ruler in the same level as the bottom of main plate. Start line must be on 0 position. The way you can revise the protractor whether it is accurate or not.
2. Measure Angle: loose screw, the subject put on the bottom of main plate handle ruler match to it, close the screw. After reading base line position on main plate. 
3. Measure Width: 0-30 metric system on the bottom of main plate. Base line put on 90 position, the subject match to handle ruler, bottom of main plate.
4. Measure Depth: handle ruler put on the cave or match the subject.
5. Draw Line: loose screw, handle ruler adjust correct angle you would like, fix crew. Then you can draw lines on it. 
 
Package included:
1 Pcs Angle Protractor Ruler