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

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

Product ID: 384167593

Details

Brand
Kynup
Material
Stainless
Measurement Accuracy
±0.001”
Product Dimensions
5.31"L x
Range
3E+2

💧IP54 splash-proof design

📏12-inch precision range

🔢3-unit easy conversion

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3682885₫

Duties & taxes included

In stock

Sold byAmazon VietnamDelivered byDesertcartCustomer service byDesertcartReturns14 days · 30 with PRO

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Details

Brand
Kynup
Material
Stainless
Measurement Accuracy
±0.001”

Description

📐 Elevate your precision game — measure like a pro, every time!

SMART POWER MANAGEMENT - Auto shut-off after 6 minutes to save battery life and keep you working uninterrupted
RUGGED RELIABLE BUILD - Stainless steel frame with splash-proof IP54 rating for durability in any workspace
MULTI FUNCTIONAL MEASURING - Measure depth, step, internal & external diameters with dual jaws and probe
VERSATILE MEASUREMENT MODES - Switch seamlessly between inch, mm, and fraction with one button
PRECISION THAT PROFESSIONALS TRUST - ±0.0015” / 0.03mm accuracy for flawless measurements every time

The Kynup Digital Caliper is a 12-inch stainless steel measuring tool designed for professionals and DIY enthusiasts. Featuring an IP54 splash-proof rating, a large LCD screen, and easy switching between inch, millimeter, and fraction units, it delivers ±0.0015” accuracy. Its multi-functional jaws and probe enable comprehensive measurements, while smart auto-off preserves battery life, making it a reliable, durable, and precise instrument for any project.

Specifications

ASIN	B09KGHRKHY
Best Sellers Rank	#882 in Industrial & Scientific ( See Top 100 in Industrial & Scientific ) #1 in Outside Micrometers
Brand	Kynup
Brand Name	Kynup
Customer Reviews	4.6 out of 5 stars 11,496 Reviews
Included Components	Screws
Item Dimensions L x W	5.31"L x 16.93"W
Manufacturer	Kynup
Material	Stainless Steel,Silver,Metal
Material Type	Stainless Steel,Silver,Metal
Measurement Accuracy	±0.001”
Model	170-4
Number of Batteries	1 CR2032 batteries required. (included)
Part Number	12INDCQC10271007
Product Dimensions	5.31"L x 16.93"W
Range	3E+2 Millimeters

Reviews

J**A

24.04.2026

G**D

11.12.2025

A**Y

9.09.2025

P**L

16.11.2025

M**C

4.04.2026

R**H

18.03.2026

J**Y

26.06.2025

J**S

16.02.2026

C**S

29.03.2024

B**T

13.04.2026

G**G

8.10.2025

H**Z

16.08.2021

S**L

28.10.2025

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