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    Adjustable Stainless Steel Angle Protractor, 200x400mm

    Adjustable stainless steel protractor measuring range 0 to 180 degrees, size of 80x120mm. The 180 degree semi-circular protractor offers unparalleled accuracy and durability, which makes it an ideal gift for students, craftsmen, architects and designers.
    SKU: ATO-AP-A400
    This product has a minimum quantity of 5
    30-day Returns
    Free Shipping
    Delivery date: 6-12 days

    Adjustable stainless steel protractor features a clear, easy-to-read scale marked in degrees and radians to ensure accurate readings every time. The metal protractor measures angles up to 180 degrees and with a size of 80x120mm, it is ideal for measuring and marking angles on a variety of materials including wood, metal and plastic.


    • Model: ATO-AP-A2040
    • Measuring Range: 0-180 degrees
    • Size: 200x400mm
    • Total Body Length: 505mm
    • Diameter of Disc: 200mm
    • Width: 19.8mm
    • Body Thickness: 1.4mm
    • Weight: 324g


    • 200x400mm Stainless steel angle protractors are highly accurate and precise in measuring angles, ensuring that your measurements are as close to perfect as possible.
    • The 180-degree angle finder ruler has a laser scale for accurate and practical reading.
    • The adjustable stainless steel construction of angle protractors makes them very durable and resistant to wear and tear, ensuring they can withstand frequent use and last for a long time.
    • ATO adjustable stainless steel angle protractor is lightweight and compact, making them easy to carry around and use on the go.

    Scribing method

    1. Adjust the protractor to the right angle and tighten the nut.
    2. Draw the desired angle and figure along the edge of the ruler.

    Measuring Method

    1. Fit the protractor measurement close to the work.
    2. Adjust the semicircle to fit the other side of the workpiece.
    3. Just take a reading.

    Dimension (Unit: mm)

    200x400mm angle protractor dimension


    Angle protractors are commonly used in fields such as construction, engineering, and carpentry to measure angles for cutting and fitting materials. They are also used in mathematics and physics to solve problems involving angles and trigonometry.
    Angle protractor applications

    Tips: What are the different types of angle protractors?

    There are several types of angle protractors used for measuring angles, including:

    • Protractor with a Half-Circle: This is the most common type of protractor and has a half-circle shape with markings from 0 to 180 degrees. It is used to
      measure angles from 0 to 180 degrees.
    • Full Circle Protractor: This protractor has a full circle with markings from 0 to 360 degrees. It is used to measure angles greater than 180 degrees.
    • Digital Protractor: This protractor uses electronic sensors to measure angles and displays them digitally. It is more accurate and easier to read than traditional protractor.
    • Vernier Protractor: This protractor has a vernier scale that allows for more precise measurement of angles. It is often used in technical fields like engineering and physics.
    • Bevel Protractor: This protractor is used for measuring angles in machine and metalworking applications. It has a swiveling arm that can be adjusted to different angles.
    • Universal Bevel Protractor: This protractor is similar to the bevel protractor but can be used to measure angles in three dimensions. It is commonly used in tool and die making and machine design.
    • Optical Protractor: This protractor uses a magnifying lens and reticle to measure angles with high precision. It is often used in optical and metrology applications.
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