Fowler 54-422-450-1 Digital Mini-Mag Protractor


The 54-422-450-1  mini-MAG Protractor provides an instant 360° digital inclination display of any angle with the additional unique feature of embedded magnets on both sides and the bottom, which makes it ideal for a variety of measurements.

SKU: 54-422-450-1 Category: Tags: , , , , , ,

Product Description


The Fowler Mini-MAG Protractor 54-422-450-1 is an electronic protractor with a 360° digital display of any angle and embedded magnets on the sides and bottom with a 5 lb. pull. 

The display automatically inverts for reading ease. The protractor has a measuring range of 360° (4 x 90°) and a hold feature that freezes the displayed reading while retaining the original zero reference information. The 54-422-450-1 protractor can also read absolute zero for use as a leveling device. It has a resolution of .05° and an accuracy of ±0.2°. 


  • Embedded magnets with 3.5lb. pull.
  • Uses standard 9V battery (250 hrs.)
  • Measuring range: 360° (4 x 90°)
  • Display inverts for easy reading
  • Resolution: .05°
  • Accuracy: ±.2°
  • Repeatability: .05°
  • Hold feature


Protractors are tools that measure specific angles, which allow users to create and replicate desired angles. They are helpful in a wide range of applications, such as setting angles on grinders, drill presses, bandsaws, table saws, and measuring angles of moldings and blades. 

About Fowler High Precision

Fowler High Precision specializes in high-quality precision tools made to the exact standards of their customers. Since 1946, they have had a track record of innovation and excellence in metrology. Now, Fowler manufactures a wide range of products, from hand tools to 3D measuring. Their mission is to make measurement easy for all. 

1-Year Warranty for Hand Tools

Fowler provides a 12-month warranty for defects in quality or materials on hand tool products sold in the United States, Canada, and Mexico. You must buy hand tools products from Fowler High Precision or an authorized Fowler distributor to qualify. Fowler reserves the right to require proof of purchase and/or a completed purchaser warranty registration for any warranty claim. To be valid, complete the Warranty Registration within 30 days after the original purchase online at

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Additional Information

Weight 1 lbs
Dimensions 2.375 × 1.375 × 2.375 in
Measuring Range


Measuring Angle Measurement


Base Style


Magnetic Base


Battery Type


Data Output











1 year

Display Type


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