Guessing an angle is how a cut gets scrapped.
Every workshop has a bevel gauge that transfers an angle without ever telling you what it is. That is fine until the second cut has to match the first.
Blade to table
Set a mitre or bevel to the quadrant and get the same cut twice
Bending and welding
Check angle iron, brackets and frames against a number you can write down
Under the car
Camber, ramp angles, anything that has to sit at a known tilt
Slope in percent
Drains, ramps and runs where the spec is a gradient, not an angle
"As described. Very readable display. I calibrated it against a professional level meter. Converts between degrees and percent."
"Works exactly as advertised. I use it to help sharpen my knives and scissors - it really is a neat device."
"Great for aligning the saw blade to the saw table. Excellent price-performance ratio."

One tool. Four jobs it replaces.
- 1
Magnetic clamp
Holds itself on a blade, a fence or a bracket - no third hand
- 2
Relative zero
Reference any surface and measure from it, not from level
- 3
Backlit flip display
Readable upside down, in a cabinet, under a car
- 4
Degrees or percent
Switches between the two, so it works for slope and for angle
Two is the right number. One for the bench, one for the toolbox.
At 150 g it belongs in the bag you actually carry, and the one that lives on the saw should never leave the saw.
Straight answers
Four quadrants of 90° each, so it measures all the way round. Some listings write this as 490°, which is a typo - there is no such thing.
The base and both sides are magnetic. It holds on blades, fences, angle iron and brackets.
Press zero against any surface and it measures relative to that one. That is how you set a blade to a table that is not perfectly flat.
