Fowler 54-422-450-1, Mini-Mag The Original Protractor 2.375 x 2.375 x 1.375"

Works as it should

This little thing is stout and built way better than similar gauges.

It was used to match the pinion angle on a rear differential to the transmission output shaft. Great tool for the job. Worked great.

I use this level for machining and electrical paperwork. This is by far one of the best degree finders that I have ever used. It’s extremely heavy it doesn’t have the light illumination but besides that it will go to zero every time all the time it’s extremely accurate.

The "Made in China" sticker on the box was a bit of a disappointment, especially since I have other precision instruments from Fowler and they did not have that sticker on the box.During the calibration process, I noticed that one side of the angle finder must be slightly off, since the angle measured was 89.95 degrees (instead of 90.00). That's within the accuracy limits of the device, but also a little bit disappointing. Thankfully, the remaining sides were all 90.00 degrees.Even with these negatives, I still think this device has some very good features that make useful for the type of work that I need it for. I need it primarily to measure driveline angles and for that it should do very well.

Use it for building car chassis

Great for checking pinion angles on rear differentials for drag cars and other applications where the pinion angle needs to be determined. Magnetic base really helps also. Great value for the price.

I've been using it in a harsh environment and it has held up well. It's been dropped on concrete a few times from table height and still works fine. It's not as sensitive as a bubble level for precise work but it's great for checking pinion angles and angles between features during welding and forming operations.