Mitutoyo Holtest Inside Micrometer

The Mitutoyo Holtest Inside Micrometer is a precision hand-held measuring tool for accurately checking internal diameters, bores, and holes. Often called a bore micrometer or internal micrometer, the Holtest line is built for machinists, toolmakers, and quality inspectors who need dependable, repeatable internal measurements.

Key Features:

• Three-point contact design that self-centers in the bore for consistent, accurate readings
• Direct-reading micrometer thimble and barrel graduations for easy interpretation
• Hardened measuring contacts for long wear life
• Ratchet or friction-style feedback for consistent measuring force
• Lock mechanism to hold a reading while removing the tool from the bore
• Precision-ground construction from Mitutoyo, a trusted name in metrology

Ideal for machine shops, tool rooms, inspection labs, and maintenance work, the Holtest inside micrometer line delivers the accuracy and durability expected of Mitutoyo measuring instruments. Multiple measuring ranges are available to suit different bore sizes.