Best Inside Micrometers of 2026

Brian Howie Avatar
Brian Howie
Last Updated: Jan 7, 2026

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Inside micrometers are precision measuring instruments used to measure the internal dimensions of an object with high accuracy. They are commonly used in manufacturing and engineering industries for quality control and inspection purposes. Inside micrometers consist of a measuring head, a thimble, and a locking mechanism to hold the measurement in place. They come in various sizes and types, such as tubular, blade, and three-point, to accommodate different measurement needs. These tools are essential for ensuring the accuracy and quality of machined parts and products.

At a Glance: Our Top Picks

Starrett Solid-Rod Inside Micrometer Set - 2-12" Range Cover #TOP 1
Starrett Solid-Rod Inside Micrometer Set - 2-12" Range
ftb score rating icon 9.9
Shars Precision Inside Micrometer Cover #TOP 2
Shars Precision Inside Micrometer
ftb score rating icon 9.8
Accusize Industrial Tools Eg00-3221 Inside Micrometer Cover #TOP 3
Accusize Industrial Tools Eg00-3221 Inside Micrometer
ftb score rating icon 9.6

Top 10 Inside Micrometers

#TOP 1

Starrett Solid-Rod Inside Micrometer Set - 2-12" Range

124BZ
2-12"
Starrett Solid-Rod Inside Micrometer Set - 2-12" Range Cover
Starrett Solid-Rod Inside Micrometer Set with Case, Insulated Rods, Quick-Reading Figures, Hardened and Ground Anvils - 2-12" Range, .001" Graduation, Padded Case Type - 124BZ

The Starrett Solid-Rod Inside Micrometer Set is a heavy-duty tool equipped with insulated rods and hardened and ground anvils. It provides accurate measurements and meets strong demands, making it an essential accessory for metalworking and woodworking industries. Starrett precision measuring tools exceed national and international standards, ensuring excellent performance for industrial, professional, and consumer markets worldwide.

What We Like
Heavy-duty and long-lasting construction
Accurate measurements for precision work
Meets strong demands and provides excellent performance
#TOP 2

Shars Precision Inside Micrometer

Shars
303-2101-PARENT
0.2-1.2" 303-2101
Shars Precision Inside Micrometer Cover
Shars 0.2"-1.2" Precision Inside Micrometer, 0.0001" Resolution 303-2101 P)

Measure with precision using the Shars 0.2"-1.2" Inside Micrometer with a resolution of 0.0001". The micrometer comes with a range of 0.2-1.2" and an accuracy of 0.0002". The satin chrome reading surface finished on the barrel and thimble is glare-free and rust-resistant. The product also comes with a setting ring, wrench, and fitted case for convenient storage and use.

What We Like
Precise measurement with a resolution of 0.0001"
Glare-free and rust-resistant satin chrome reading surface
Comes with a setting ring, wrench, and fitted case for convenient storage and use
#TOP 3

Accusize Industrial Tools Eg00-3221 Inside Micrometer

EG00-3221
0.2-1.2"
Accusize Industrial Tools Eg00-3221 Inside Micrometer Cover
Accusize Industrial Tools 0.2-1.2'' by 0.001'' Inside Micrometer, Satin Chrome Finished, Eg00-3221

The Accusize Industrial Tools Eg00-3221 Inside Micrometer is an essential tool for precise measurements in mechanical engineering and machining. With a range of 0.2-1.2" and a graduation of 0.001", this micrometer offers accuracy of 0.00028", and a resolution of 0.0001". The satin-chrome finish gives a smooth and durable surface, while the hardened and ground faces ensure longevity. The ratchet stop and locking clamp make it easy to adjust the side movement of the jaw, providing more convenience and accuracy. Whether you are a professional machinist or a DIY enthusiast, the Accusize Inside Micrometer is a reliable and precise tool that will make your work more efficient and accurate.

What We Like
Precise measurements
Accurate
Durable
#TOP 4

Shars Inside Micrometer Set

Shars
303-2215-PARENT
2-24" 303-2214
Shars Inside Micrometer Set Cover
Shars 2-24" Inside Micrometer Set, 0.001" Graduation 303-2214 P

The Shars Micrometer Set is a versatile and accurate tool for measuring inside dimensions. With a measuring range of 2-24", this set allows you to measure a wide range of objects with precision. The micrometer head, along with the included tubular extensions, provides flexibility in measuring different lengths. The accuracy of 0.00005" ensures reliable and precise measurements. The referenced setting standard and wrench make it convenient to set up and use. Whether you are working on machining projects or need precise measurements in your workshop, the Shars Micrometer Set is a reliable and convenient tool to have.

What We Like
Versatile
Accurate
Precise
#TOP 5

Mitutoyo Tublar Inside Micrometer

139-201
Black
Mitutoyo Tublar Inside Micrometer Cover
Mitutoyo 139-201, 1.5" - 12" X .001" Tublar Inside Micrometer

The Mitutoyo 139-201 Tublar Inside Micrometer is a versatile tool that can measure a wide range of ID measurements. It features a 1/2" travel mic head, clear graduations on a satin chrome finish mic head, and each extension tube is marked with its size. It comes with a fitted plastic case for easy storage and transport.

What We Like
Versatile tool for measuring a wide range of ID measurements
1/2" travel mic head
Clear graduations on satin chrome finish mic head
Each extension tube is marked with its size
Comes with a fitted plastic case for easy storage and transport
#TOP 6

Accusize Industrial Tools 1-2'' Inside Micrometer

EG00-3222
1-2"
Accusize Industrial Tools 1-2'' Inside Micrometer Cover
Accusize Industrial Tools 1-2'' by 0.001'' Inside Micrometer in Fitted Case, Satin Chrome Finished, Eg00-3222

The Accusize Industrial Tools 1-2'' Inside Micrometer, also known as the Accusize Inside Micrometer, is a precision measuring tool designed for accurate measurements in tight spaces. With a resolution of 0.0001'', this micrometer allows you to measure with high precision, ensuring accurate results. The satin-chrome finish not only gives it a sleek and professional look, but also provides durability and resistance to rust and corrosion. With a range of 1-2'' and a graduation of 0.001'', this micrometer is suitable for a variety of applications. Its accuracy of 0.00028'' ensures reliable and precise measurements. Whether you are a professional or a DIY enthusiast, the Accusize Inside Micrometer is a versatile tool that will help you achieve accurate measurements with ease.

What We Like
High precision
Durable satin-chrome finish
Versatile range
#TOP 7

Starrett 823EZ Tubular Inside Micrometer Set

823EZ
4-to-40-Inch Range
Starrett 823EZ Tubular Inside Micrometer Set Cover
Starrett Tubular Inside Micrometer Set with Case, Lock Nut, Quick-Reading Figures, Hardened, Interchangeable and Ground Anvils - 4-40" Range, .001" Graduation - 823EZ

The Starrett Tubular Micrometer is a robust tool designed for precision measurement. Its lightweight, rigid rods feature easy-to-read markings, making your measuring tasks simpler and more efficient. The hardened and ground anvils ensure durability and consistent performance, giving you confidence in your measurements. Additionally, the interchangeable anvils allow you to customize your gaging needs, providing versatility across various applications. Whether you are in metalworking or woodworking, this micrometer is an essential accessory that enhances accuracy and reliability in your projects.

What We Like
Lightweight and durable design
Easy-to-read measurements
Interchangeable anvils for versatility
Long-lasting performance
#TOP 8

Accusize 2-6" Inside Micrometers Set 3011-2051

3011-2051
2-6"
Accusize 2-6" Inside Micrometers Set 3011-2051 Cover
Accusize Industrial Tools - 2-6'' Inside Micrometers Set 0.001'' Increments, 3011-2051

The Accusize Inside Micrometers provide precise measurements from 2 to 6 inches, making it easy for you to measure internal dimensions accurately. With a fine resolution of 0.0001 inches, you can ensure high precision in your machining or inspection tasks. The set includes extension rods of 0.5, 1, and 2 inches, giving you flexibility to measure different depths without hassle. Plus, the rods have a diameter of 0.61 inches, which is ideal for reaching inside parts comfortably. This tool is designed to help you work efficiently and confidently with internal measurements.

What We Like
Wide measuring range
High precision resolution
Interchangeable extension rods
Comfortable rod diameter
#TOP 9

Accusize 2-12" Inside Micrometers Set

3011-3051
2-12"
Accusize 2-12" Inside Micrometers Set Cover
Accusize Industrial Tools - 2-12'' Inside Micrometers Set 0.001'' Increments, 3011-3051

The Accusize Inside Micrometers set offers a versatile measuring range from 2 to 12 inches, letting you handle a variety of internal dimension tasks with ease. It includes multiple extension rods—0.5", 1", 2" (two pieces), and 4"—so you can measure deeper or hard-to-reach areas without hassle. Each rod is designed to fit uniformly with a 0.61-inch diameter, ensuring smooth compatibility with different bore sizes. Plus, you get a standard caliper gauge for zero setting, making it simple to calibrate and maintain accuracy during your measurements. This set is perfect for precise, detailed work in your projects.

What We Like
Wide 2-12" measurement range
Multiple extension rods included
Uniform rod diameter
Standard caliper gauge for zero setting
High precision increments (0.001")
#TOP 10

Accusize Industrial Tools Inside Micrometer Set

3011-5051
2-24"
Accusize Industrial Tools Inside Micrometer Set Cover
Accusize Industrial Tools 2-24'' by 0.001'' Resolution Inside Micrometer Set, 3011-5051

The Accusize Industrial Tools Inside Micrometer Set features extension rods that provide a wide measuring range, with each interchangeable rod marked with its measuring range. It comes with a standard caliper gauge for zero setting and has an accuracy of Metric(3+n+L/50)μm, (n=number of rod, L=maximum. Measuring length (mm) [Inch]. The resolution is 0.0001". The set includes extension rods of 0.5", 1", 2", 4", 6", 8", and has a range of 2-24".

What We Like
Wide measuring range
Interchangeable rods marked with measuring range
Standard caliper gauge for zero setting
Buying Guide Image

Frequently Asked Questions (FAQs)

1. What are the 3 types of micrometer?

There are various types of micrometers, including inside micrometers, bore micrometers, tube micrometers, and depth micrometers. Each type has a different measurable range, typically in increments of 25 mm, and it is important to use the appropriate micrometer for accurate measurements.

2. What is an outside micrometer used for?

An outside micrometer is primarily used for measuring the thickness or outside diameter of small parts. It is a commonly used tool in industries due to its high accuracy and ease of use.

3. How do you read a .0001 micrometer?

To read a .0001 micrometer, you need to use the additional scale called the Vernier scale. The Vernier scale consists of ten divisions marked on the sleeve, with each graduation representing .0001 inches. By aligning the lines on the Vernier scale with the lines on the sleeve, you can accurately determine the measurement.

4. What is different about reading an inside micrometer from an outside micrometer?

Reading an inside micrometer differs from reading an outside micrometer. Inside micrometers are used to measure the inside dimensions of holes, tubes, pipes, or grooves. They have jaws that expand and contract to provide accurate measurements. In contrast, outside micrometers resemble a clamp and are used to measure the thickness or diameter of a part.

Editor's Notes

During our inside micrometer research, we found 24 inside micrometer products and shortlisted 10 quality products. We collected and analyzed 6,476 customer reviews through our big data system to write the inside micrometers list. We found that most customers choose inside micrometers with an average price of $292.56.

The inside micrometers are available for purchase. We have researched hundreds of brands and picked the top brands of inside micrometers, including Starrett, Shars, Accusize Industrial Tools, Mitutoyo. The seller of top 1 product has received honest feedback from 197 consumers with an average rating of 4.8.

Written by
Brian Howie Avatar

Brian Howie is a content writer and senior industrial designer. After graduation from Westminster College, he has been engaged in product design and manufacturing for 18 years. Brian Howie has always found great pleasure in designing industrial products and sharing his ideas and experience online.