Mitutoyo 368-918 Holtest 3-Point Internal Micrometer Set 0.8-2.0 Inch Range

The Mitutoyo 368-918 Holtest is a precision 3-point/2-point internal micrometer set designed for accurate bore measurement in the 0.8 to 2.0 inch range. This professional-grade measuring instrument features a self-centering design that ensures repeatable, accurate measurements of internal diameters, including blind bores.

Key Features:

• Three contact points made of hardened alloyed steel for durability and precision
• TiN (Titanium Nitride) coated contact points for extended wear resistance
• Measuring range: 0.8 to 2.0 inches (minimum bore diameter 0.65 inches)
• Self-centering three-point contact system for consistent measurements
• Can measure closer to the bottom of blind bores than conventional designs
• Includes extension rod for extended reach applications
• Complete set includes micrometer head units and measuring heads for each size range

The Holtest's three-point contact design automatically centers the tool in the bore, eliminating operator influence and providing superior repeatability compared to two-point micrometers. The TiN coating on contact points significantly extends tool life in production environments. Ideal for inspection departments, tool rooms, and precision manufacturing applications requiring accurate internal measurements.