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Angle gauge · magnetic

XUNTOP XOPXOP039 digital angle gauge

Seventeen euros to stop trusting the scale printed on the saw — provided you read the accuracy figure and not the resolution.

Magnetic digital angle gauge with V-grooved base, product photograph

XUNTOP XOPXOP039 digital angle gauge

Seventeen euros to stop trusting the scale printed on the saw — provided you read the accuracy figure and not the resolution.

Range
4 × 90°
Accuracy
±0.2°
Resolution
0.05°
Base
Magnetic, with a V groove
Display
VA, rotates automatically
Battery
3.7 V, 260 mAh, USB-C charging
Sealing
IP54
Part number
XOPXOP039
Availability
No EAN published — other markets could not be verified
Amazon reference
B0G1YDKLT5
  • A V-grooved magnetic base sits on a blade or a round column without sliding
  • USB-C charging rather than a coin cell that dies unnoticed
  • The display shows 0.05° while the instrument is accurate to ±0.2° — four times coarser

Best for: Setting the bevel on a mitre saw or table saw without believing the printed scale

≈ $19
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Specifications

Range
4 × 90°
Accuracy
±0.2°
Resolution
0.05°
Base
Magnetic, with a V groove
Display
VA, rotates automatically
Battery
3.7 V, 260 mAh, USB-C charging
Sealing
IP54
Part number
XOPXOP039
Availability
No EAN published — other markets could not be verified
Amazon reference
B0G1YDKLT5

Every figure below is a manufacturer specification read off the listing itself. The judgments are ours.

What the specification says

A range of 4 × 90°, accuracy of ±0.2°, resolution of 0.05°, magnetic V-grooved base, auto-rotating VA display, IP54, and a 3.7 V 260 mAh cell charged over USB-C. Part number XOPXOP039. No EAN on the listing.

Resolution is not accuracy

These are two different specifications and the cheaper the instrument the further apart they sit. Resolution is how finely the number is displayed; accuracy is how far that number can be from the truth. Here the display is four times finer than the instrument, which is not a defect — it is simply what the two figures mean, and only one of them belongs in a decision.

Zero it on the table

The way to get more out of a gauge than its stated accuracy is to use it comparatively. Zero on the saw table, transfer to the blade, and read the difference. Both readings carry the same offset and subtracting them removes it, which is also the only way to be sure a bevel is truly 45° to the table rather than to the floor.

Availability

Read on the day this page was built: $19 at the American Amazon shop.

Read from Keepa on the day this page was last revised; stock and price both move without notice.

Prices quoted in this text were read on 2026-08-12. The live price is at the top of the page.

Saws this fits

What comes up most often

Is 0.05 degrees really the accuracy?

No — that is the resolution, which is only the smallest increment the display can show. The accuracy is ±0.2°, four times coarser. A gauge that reads to two decimal places while being accurate to two tenths is normal in this price class, and treating the last digit as meaningful is the commonest mistake made with these instruments.

How should I use it on a saw?

Relatively, not absolutely. Zero the gauge on the table, then move it to the blade and read the angle — the two readings share the instrument's error and it cancels out. Reading the blade alone against gravity keeps the error in, and it also assumes the table is level, which no workshop bench is.

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    Lengths
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    Stops
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    Amazon reference
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    EAN
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    Amazon reference
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    EAN
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    Accuracy
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    Supplied with
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Elsewhere in the workroom

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    Amazon reference
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    EAN
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    Amazon reference
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All measuring & marking