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Product guide

BOLTX 150 mm Digital Vernier Caliper

BOLTX digital vernier caliper is a 150 mm measuring tool with an LCD, inch/mm conversion and a zero-setting function. Its listing gives a resolution of 0.01 mm and accuracy of 0.03 mm, while customer feedback is mixed on accuracy, so consider whether that specification meets your measurement needs.

At a glance

The stated 150 mm range is paired with inch and millimetre readings.
The feature description lists inside, outside, depth and step measurements.
A zero-setting function is described for comparing small differences.
The listing claims hardened stainless steel and ABS construction, plus a thumb locking screw for positioning.

Price

£11.21Save 15%

Reference price: ~~£13.19~~

Price checked: 13 Nov 2026

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Pros and cons

Pros

Inch/mm conversion and a zero function support switching units and taking comparative measurements.
The stated measurement modes cover internal, external, depth and step dimensions.
Customer feedback describes the build as well-constructed.

Cons

Customer feedback is mixed on accuracy, which matters for work where repeatable precision is important.

Technical specifications

11 specifications

Identity and display
Brand	BOLTX
Screen technology listed	LCD

Measurement
Range	150 millimeters
Resolution	0.0005in/0.01mm
Accuracy	+/- 0.001 inches
Accuracy in feature description	0.001in/0.03mm

Materials and operation
Materials	hardened stainless steel and ABS materials
Units	inch and millimeter
Measurement modes	inside, outside, depth, and step dimensions
Zero setting	The zero setting function allows measurements to be reset at any position

Power
Battery requirement	1 Nonstandard Battery batteries required. (included)

What to know before buying

Listing details to confirm

Accuracy is listed as +/- 0.001 inches in the details but as 0.001in/0.03mm in the feature description, while the feature also gives a resolution of 0.0005in/0.01mm. Confirm the specification appropriate for your work before relying on fine measurements. The title's 6-inch description corresponds to the stated 150 mm range.

What’s in the box

Included

Digital Vernier Calipers

Who is it for?

A good fit for

DIY users measuring small parts or components in inches or millimetres.
Hobbyists and workshop users who need inside, outside, depth and step measurements.
Buyers who want a digital readout and zero setting for comparing dimensions.

Less suited to

Applications that require independently verified accuracy or a guaranteed tolerance.

BOLTX 150 mm Digital Vernier Caliper · photo 2 — Additional product photo 2

Customer reviews on Amazon

4.1 / 5 · 57 ratings

5 stars61%61%
4 stars16%16%
3 stars10%10%
2 stars3%3%
1 star10%10%

Customer feedback describes the caliper as well-built and good value, but reports are mixed on accuracy, with some finding it accurate and others not. That matters if you need repeatable fine measurements, particularly because the listing gives different accuracy figures in its details and feature description. Consider whether the claimed 150 mm range and digital functions suit your work, and verify the accuracy requirement before relying on it.

Positive themes

Customers describe the build as well-built.

Mixed feedback

Customer feedback is mixed on accuracy, with some finding it accurate and others reporting that it is not very accurate.
Value-for-money feedback is noted, but the available summary does not establish a single consistent view.

Frequently asked questions

What is the stated measuring range?

The listing gives a range of 150 millimeters and describes the tool as 6 inch.

Can it show measurements in inches and millimetres?

Yes. The listing says it switches between inch and millimetre units.

What accuracy does the listing claim?

The details state +/- 0.001 inches. The feature description states 0.001in/0.03mm accuracy and 0.0005in/0.01mm resolution, so confirm which figures apply before buying for precision-critical work.

What measuring modes are described?

The feature description lists inside, outside, depth and step measurements.