Best Inside Micrometers in 2026

Range: 2-20", Extension Rods: 0.5", 1", 2" (2 pcs), 4", 8", Accuracy: Metric(3+n+L/50)μm, (n=number of rod, L=maximum measuring length (mm) [Inch]) Resolution: 0.0001"

The combining of extension rods provides a wide measuring range

Supplied with a standard caliper gauge for zero setting

Used to measure a wide range of ID measurements

1/2" Travel mic head

Size in marked on each extension tube

Digital Micrometer Gage: The micrometer gage features a flat anvil and spindle for general purpose measuring with microfine graduations and carbide-tipped measuring faces

Precision Measurements: Features a 0-1"/0-25mm range and an accuracy of 0.00016″/0.004mm; this micrometer has a ratchet thimble that provides smooth performance and is suitable for one-handed operation

Easy to Use: Digital micrometer features a large LCD that performs direct inch/metric conversions and has a switchable resolution of 0.00005"/0.001mm; IP54 specifications for dust and water protection

Heavy-Duty - The Starrett Solid-Rod Inside Micrometer has insulated rods marked with length, adjustable for length and quick-reading figures.

Hardened and Ground Anvils - The micrometer is equipped with hardened and ground anvils, while the measuring rods are solid. It has an excellent service life and outstanding work performance.

Meets Strong Demands - Committed in providing customers with consistent and reliable solutions, Starrett has set the standard for precision, quality and innovation. Our products are long-lasting, robust with excellent service and performance.

Used to measure a wide range of ID measurements.

1" Travel mic head.

Size in marked on each extension tube.

SKU# 303-2101

Measuring Range: 0.2-1.2"

Accuracy: 0.0002"; Resolution: 0.001"

Quality Made - The Starrett Solid Rod Inside Micrometer Set has adjustable insulated rods marked with length, hardened and ground advils along with quick-reading figures, and provides years of reliable service.

The Perfect Accessory - Used in a wide variety of industries as an essential part of metalworking and woodworking, Starrett tools can be used in various applications and offers unparalleled service with execution like no other.

Meets Strong Demands - Committed in providing customers with consistent and reliable solutions, Starrett has set the standard for precision, quality and innovation. Our products are long-lasting, robust with excellent service and performance.

Set of twelve vernier scale micrometers in inch units for taking precise outside diameter (OD) measurements

Ratchet-stop or friction thimble mechanism helps provide uniform pressure for precise, repeatable measurements

Baked enamel finish for protection and durability of frame and satin chrome finish on thimble and sleeve helps resist rust and reduce glare

Tubular micrometer measures the inside dimensions of cylinders, rings, and parallel surfaces

Vernier scale in inch units for taking precise inside dimension (ID) measurements

Includes interchangeable extension rods for a diversified range of measurement

Three-point contacts for self-centering measurement of the inside dimension (ID) of bores

Digital, single-value readout LCD displays in inch and metric units for readability

Statistical Process Control (SPC) output transmits results to a computer or external device through an interface cable (sold separately)

Heavy-Duty - The Starrett Tubular Inside Micrometer has rigid and lightweight rods, and quick reading figures. Extension rods are made of steel tubing and each rod is marked with length.

Hardened and Ground Anvils - The tubular comes with hardened and ground anvils. It has an excellent service life and outstanding work performance.

Interchangeable Anvils - It is equipped with easily interchangeable anvils for diversified gaging, providing the full range in steps with a micrometer.

Caliper type jaws are made of high-grade, tool steel

Locking clamp for positive locking of spindle

Satin-chrome finished

Three-point contacts for self-centering measurement of the inside dimension (ID) of bores

Vernier scale in inch units for taking precise inside dimension (ID) measurements

Ratchet-stop mechanism helps provide uniform pressure for precise, repeatable measurements

Tubular micrometer measures the inside dimensions of cylinders, rings, and parallel surfaces

Digital, single-value readout LCD displays in inch and metric units for readability

Statistical Process Control (SPC) output transmits results to a computer or external device through an interface cable (sold separately)

SKU# 303-2214

Measuring Range: 2-24"

Accuracy: 0.00005"X(3+N+L/2)

Heavy-Duty - The Starrett Tubular Inside Micrometer has rigid and lightweight rods, quick reading figures and lock nut. Extension rods are made of steel tubing and each rod is marked with length.

Hardened and Ground Anvils - The tubular comes with hardened and ground anvils. It has an excellent service life and outstanding work performance.

Interchangeable Anvils - It is equipped with easily interchangeable anvils for diversified gaging, providing the full range in steps with a micrometer.

Tubular micrometer measures the inside dimensions of cylinders, rings, and parallel surfaces

Vernier scale in metric units for taking precise inside dimension (ID) measurements

Includes interchangeable extension rods for a diversified range of measurement

Includes interchangeable rods for a diversified range of measurement

Vernier scale in inch units for taking precise inside dimension (ID) measurements

Locking clamp to hold measurements in place

Includes interchangeable rods for a diversified range of measurement

Vernier scale in inch units for taking precise inside dimension (ID) measurements

Locking clamp to hold measurements in place

MEASUREMENT TOOL: Used for machine tools, fixtures and special measuring tools, etc.

CONVENIENT TO USE: Accuracy design, high accuracy and easy to use.

USED FOR: Suitable for fine-tuning of various accuracy instruments and measuring equipment.