What is the measurement range? I need to know the very smallest inside diameter it can measure as well as the largest.

The smallest inside will depend how deep you go, but close to surface I would say 1mm or even less. It goes up to 150mm.

could I use this to measure nut size so as to get the right socket?

Yes, you can. Measure the diameter of the nut from one flat side to the opposite flat side. That will be the size of the nut.

what are the drops and diamond images on the ruler for?

The RedBlack-01 has drops on the ruler and the RedBlack-02 and RedBlack-03 versions have drops and diamonds on the ruler. I do not think they are for anything specific, other than decoration. The ruler is only necessary on dial calipers, because the dial only shows sub-inch measurements. On a dial caliper, you add the dial number to the inch number showing on the ruler to get the full measurement. On digital calipers, the full measurement is shown on the display. The ruler is left-over from the older dial calipers most likely for tradition. Therefore, I'm assuming that the diamonds and drops are just for decoration.

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Adoric Digital Caliper, 0-6" Electronic Caliper Auto - Off Feature with Large LCD Screen Vernier Caliper Conversion Measuring Tool for Length Depth Inner Outer Diameter Measuring

Adoric Digital Caliper, 0-6" Electronic Caliper Auto - Off Feature with Large LCD Screen Vernier Caliper Conversion Measuring Tool for Length Depth Inner Outer Diameter Measuring

Product ID: 370066507

Details

Brand
Adoric
Material
Plastic
Measurement accuracy
± 0.2 mm
Product dimensions
12L x 6W
Range
6

📏0-6" range with 0.01" precision

📐Multi-function: depth, inner/outer diameter

🔋Auto shut-off & spare battery included

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Description

📏 Measure Like a Pro, Every Time!

SMART POWER MANAGEMENT - Auto shut-off after 5 minutes plus a spare battery ensures you’re never caught off guard.
SEAMLESS UNIT SWITCHING - Instantly toggle between inches and millimeters with a single button—no hassle, no guesswork.
VERSATILE MEASUREMENT MODES - From outer diameters to depths and steps, handle all your precision needs with one tool.
DURABLE USER FRIENDLY DESIGN - Sturdy carbon fiber composite resists rust and scratches, paired with a large LCD for effortless reading.
PRECISION THAT PROFESSIONALS TRUST - Measures with ±0.01"/0.2 mm accuracy for flawless results every time.

This 0-6" digital caliper delivers professional-grade precision with 0.01" resolution and ±0.2 mm accuracy. Featuring a large LCD screen, easy inch/mm conversion, and multi-functional jaws for inside, outside, depth, and step measurements, it’s built with durable carbon fiber composite for long-lasting use. Smart auto shut-off and a spare battery keep you powered through any project.

Specifications

ASIN	B091HQLDWK
ASIN	B091HQLDWK
Batteries	1 CR2 batteries required. (included)
Best Sellers Rank	#54,746 in Tools & Home Improvement ( See Top 100 in Tools & Home Improvement ) #63 in Digital Calipers
Brand Name	Adoric
Customer Reviews	4.4 4.4 out of 5 stars (1,146)
Customer reviews	4.4 4.4 out of 5 stars (1,146)
Date First Available	21 July 2021
Item Dimensions L x W	12L x 6W centimeters
Item model number	GRE
Manufacturer	Adoric
Manufacturer	Adoric
Material Type	Plastic
Measurement Accuracy	± 0.2 mm
Model	GRE
Number of Batteries	1 CR2 batteries required. (included)
Part Number	GRE
Product Dimensions	12 x 6 x 1.27 cm; 91 g
Range	6
Unit Count	1 Count

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€ 33.25

Duties & taxes included

In stock

Sold byAmazon FranceDelivered byDesertcartCustomer service byDesertcartReturns14 days · 30 with PRO

Buyer Protection · Full refund if your order doesn't arrive as described.

Desertcart purchases this item on your behalf and handles shipping, customs, and support to France.

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