How wide an angle, in degrees, does this measure? 180°? 359°?

It will continue counting beyond 360 if you keep rotating it. It goes forever.

will this fit tight in an inside corner?

That depends on the size of the corner. The angle finder I have is 8.55 inches long and just under 1.4 inches wide when closed, so the corner must be large enough for the tool to fit inside. The pivot end has a radius slightly smaller than half the with of the two straight edges. You can make a mockup of the tool using the dimensions I have given here an the angle you need and see if it fits the corner you want.

Are measurements laser ecthed?

The measurements are etched, not printed.

Does it split the angle in half for miter cuts?

I have had to do a lot of atypical miters and how I do this is to cut one miter angle and them measure this angle to determine the other angle on the miter. This has worked well, but can difficult if you do not have the space needed to expand the Gem Red. Overall this is a remarkable tool that is very accurate. But I needed to buy a smaller digital angle finder to work in smaller spaces. After working with the digital, would never go back to non digital.

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📐 Measure Like a Pro, Lock in Your Edge!

LOCK IT ROCK IT - Secure any angle with the intuitive locking function, so your measurements stay exact during every project.
LONG LASTING POWER PLAY - Powered by a lithium metal battery delivering up to 2000 hours of uninterrupted precision—work smarter, not harder.
EFFORTLESS ANGLE MASTERY - Digital inclinometer with a sharp LCD display makes reading inside and outside angles a breeze—no guesswork needed.
PRECISION MEETS DURABILITY - Stainless steel ruler with laser-etched markings ensures years of crystal-clear, reliable measurements.
360 FULL SPECTRUM MEASURING - Cover every angle imaginable with a full 360-degree range—perfect for woodworking, construction, and repairs.

The GemRedDigital 200mm Digital Angle Finder combines industrial-grade stainless steel durability with a high-precision ±0.3° digital inclinometer and a clear LCD display. Featuring a 360° measuring range and a locking function, it’s engineered for professionals demanding accuracy and reliability in woodworking, construction, and repair tasks. Lightweight and battery-efficient, it offers up to 2000 hours of continuous use, making it an indispensable tool for precise angle measurement.

Reviews

D**Y

Nicely made, clear, and very accurate.

Apart from the battery fitting being a bit fiddly, these work really well and make setting up cutting tools and measuring cut angles really simple and precise.

9.03.2025

L**R

Seem to do the job, unsure exactly how accurate they are

Bought to replace a set from Trend which were awful. These seem ok. Time will tell.

17.09.2024

D**F

great item, difficult battery replacement

bought to replace a similar one that broke it works perfectly and is repeatably accurate....the downside is the impossibly fiddly battery replacement that requires three hands !.... why ????

19.09.2024

R**L

Good quality tool.

Works a .treat

21.07.2025

M**S

Works well

Does what it's supposed to do. Nice and clear markings

20.10.2024

A**R

Accurate

Received it today. Having zeroed it on a perfectly flat surface, I checked the accuracy against a very high end engineers square and found it to be on the money.I haven't had it long enough to comment on it's reliability, but hope it stands the test of time.

1.02.2024

D**H

Digital angle finder

Brilliant little instrument for measuring angles accurately and not a bad price either ☺️ seems well made too

17.04.2024

G**N

Very accurate

Bought to cut beading on no square corners.Brilliant, should have bought one years ago.Very accurate and easy to read.

6.06.2024

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Manufacturer	GemRed
Part number	82305-200D
Item Weight	200 g
Product Dimensions	40 x 2.01 x 0.25 cm; 200 g
Batteries	1 Lithium Metal batteries required.
Item model number	82305
Size	200mm
Colour	200mm
Style	Industrial
Material	Stainless Steel
Item Package Quantity	1
Measurement Accuracy	±0.3°
Batteries included?	No
Batteries Required?	Yes
Battery Cell Type	Lithium Metal
Battery life	2000 Hours

GemRedDigital Angle Finder, 200mm Digital Inclinometer Protractor, Stainless Steel Angle Measure Tool Angle Ruler with LCD Display for Woodworking Construction Repairing

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