How do you set the display where all the numbers are big? it shows a picture where there all big?

There is a select button to cycle though a choice of display options. There is also a zero button along with an on/off button (if my 78 y.o. memory serves me correctly). If that doesn't do what you want, I'm out of guesses. One observation might be that only whole and NOT fractional numbers appear large. Hope this helps.

What size screw is needed for battery cover? I tried jeweler screws but they are too small. I lost mine replacing battery.

I'm not sure but if you go to lowes or tractor supply I'm sure you'll find what you need fairly easy.

What is the casing of the digital readout made of? Plastic or metal?

The description says the housing is made of metal with a silver paint finish. Feel and weight suggests metal construction. It is heavier than others I have that are plastic.

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Kynup Digital Caliper, 300mm Caliper Measuring Tool with Stainless Steel, IP54 Splash Proof Protection Design, Large LCD Screen, Easy Switch from Inch Metric Fraction (12 Inch)

Kynup Digital Caliper, 300mm Caliper Measuring Tool with Stainless Steel, IP54 Splash Proof Protection Design, Large LCD Screen, Easy Switch from Inch Metric Fraction (12 Inch)

Product ID: 656877369

Details

Brand
Kynup
Material
Stainless
Product dimensions
13.5L x 43W
Range
3E+2
Measurement accuracy
±0.001”

💧IP54 splash-proof design

📏300mm precision range

🔋5-year battery life

Description

📐 Measure Like a Pro, Every Time!

BUILT TO LAST RESIST - Crafted from premium stainless steel with IP54 splash-proof protection to withstand any workspace.
SEAMLESS UNIT SWITCHING - Instantly toggle between inch, mm, and fraction units with a single button for ultimate convenience.
SMART AUTO OFF BATTERY SAVER - Maximize efficiency with automatic shutdown after 6 minutes of inactivity, powered by a long-lasting battery.
PINPOINT PRECISION EVERY TIME - Achieve ultra-accurate measurements with ±0.0015”/0.03mm accuracy and 0.0005”/0.01mm resolution.
VERSATILE 4 IN 1 MEASURING POWER - Measure depth, step, internal & external diameters effortlessly with dual jaws and probe.

The Kynup Digital Caliper is a robust 300mm stainless steel measuring tool designed for professionals and DIY enthusiasts. Featuring ultra-precise accuracy, a large LCD display, splash-proof IP54 protection, and versatile measurement modes, it ensures reliable and effortless readings. Its long-lasting battery and smart auto-off function make it a durable, efficient companion for any project.

Specifications

ASIN	B09KGHRKHY
Brand	Kynup
Customer Reviews	4.4 out of 5 stars 170 Reviews
Included Components	Screws
Item Dimensions L x W	13.5L x 43W centimetres
Manufacturer	kynup
Material	Stainless Steel
Measurement Accuracy	±0.001”
Measurement accuracy	±0.001”
Number of Batteries	1 CR2032 batteries required. (included)
Number of batteries	1 CR2032 batteries required. (included)
Product dimensions	13.5L x 43W centimetres
Range	3E+2

Reviews

J**S

Looks good

17.01.2026

A**R

Accuracy

25.08.2025

A**R

Good article

It is of very good quality and has precise and tight tolerances. For the price, it is a very good product. I recommend it. Now let's see if it lasts with the rigor of a machinist's work, Bueno mantiene la dimension y es bien precisó lo recomiendo es mi evaluación a simple vista pero cuando lo someta al trabajo diario veremos si se mantiene la calidad

18.06.2025

P**4

It is what it is

11.12.2024

J**Z

👍👍👍👍👍

Entrega rápida y el artículo en buenas condiciones

7.05.2025

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