how do you read this vernier

Using the second photo as example: the 0 of the (sliding) vernier scale is just shy of the 6mm mark, so there are 5 full mm. And then check where the markings on the main scale and the vernier scale line up perfectly. This is the case one mark left of the 9 on the vernier scale. If it were exactly on the 9, then the total reading would be 5.9mm. But because it's one mark left of the 9 and each of those marks between 8 and 9 is 0.02mm the total is 5.88mm.

Etched or printed numbers and lines?

Etched. This is a surprisingly high quality tool for the price. Do you know how to read a vernier?

How long are the external jaws?

40 mm for the outside reading, 16.5 mm inside reading. The precision cutout at the end is 9.5 mm long, and the steel is 3 mm thick. These are quite typical measures for calipers of this type (i.e., they are identical to my digital-scale calipers).

This divided into 10ths of an inch, then each 10th into 1/4ths ? Each inch is broken into 40 segments.Mitutoyo is only in 16ths. How do you read this?

This caliper measures in 1/1000 of an inch, not in power of two fractions. Each segment is 1/40 = 0.025 inch, and the vernier scale reads from 0 to 25 (0 to 0.025, really). As an example, the 3rd line past 1.1 inch gives you 1.175 inches (1.1 + 3 * 0.025), and the vernier scale gives you the rest, if the lines match up at 12 you add 0.012 to the result you got from the regular scale, 1.175 + 0.012 = 1.187.

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- Spurtar (スパーター) Caliper 150mm Carbon Steel Measuring Caliper with Storage Case and Ruler, Maximum Measurement 150mm High Precision Carbon Steel Caliper NGS-150KS

Product ID: 742106131

Details

Brand
Spurtar
Material
Carbon Steel
Measurement Accuracy
0.02mm/0.001"
Product Dimensions
2.32L x 0.08W
Range
150

📏150mm max range

⚙️0.02mm / 0.001in precision

🛠️Carbon steel durability

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VT9438

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Description

📐 Measure Like a Pro, Lead Like a Boss

DUAL SCALE CONVENIENCE - Switch seamlessly between metric and imperial units—no conversions, no delays, just pure efficiency.
VERSATILITY IN EVERY DIMENSION - Measure outer, inner diameters, depth, and steps effortlessly with one tool—your all-in-one precision partner.
EFFORTLESS ONE HANDED OPERATION - Smooth sliding carbon steel design lets you measure quickly and confidently, even on the go.
PRECISION THAT COMMANDS RESPECT - Experience ultra-fine measurements with ±0.02mm accuracy—because details matter in your craft.
BUILT TO LAST DESIGNED TO IMPRESS - Premium carbon steel construction with a sleek storage case ensures your caliper stays sharp and ready for any project.

The Spurtar 150mm Carbon Steel Caliper combines industrial-grade precision (±0.02mm) with versatile measurement functions and dual metric/imperial scales. Crafted from durable carbon steel and housed in a protective case, it’s engineered for professionals who demand accuracy and reliability in every project.

Specifications

ASIN	B074HZ8S21
Amazon Bestseller	#5,392 in DIY, Tools & Garden ( See Top 100 in DIY, Tools & Garden ) #9 in Vernier Calipers
Brand Name	Spurtar
Country Of Origin	China
Customer Reviews	4.1 4.1 out of 5 stars (9,809)
Included Components	1 x 150mm Knows, 1 x Carbon Steel Ruler, 1 x Rag, 1 x Storage Case
Item Dimensions L x W	2.32L x 0.08W m
Manufacturer	King Company
Material Type	Carbon Steel
Measurement Accuracy	0.02mm/0.001"
Model	kingcompany
Part Number	kingcompany
Range	150 Millimeters
UPC	655302158944
Unit Count	1.0 Count

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