This precision internal measuring tool is designed to deliver accurate, repeatable readings for bore and internal diameter measurements. It combines a robust locking mechanism with a clear, easy to read display and high quality alloy measuring heads for versatility and durability. Key benefits - Stable readings: locking device holds the measurement in place so you can read and record data without drift. - Reliable repeatability: built in ratchet stop provides consistent readings across multiple measurements. - Clear and intuitive: precise mechanical design makes it easy to read and interpret measurements quickly. - Versatile and burr-free: alloy measuring heads support a range of internal sizes with fine workmanship and smooth, burr-free surfaces. - Easy adjustment: calibration ring and a small wrench are provided for fine adjustments to maintain accuracy. Key features - Locking device to fix measurements during reading - Precise machinery structure for intuitive and convenient reading - Alloy measuring heads designed for various internal size measurements - Fine workmanship with burr-free surfaces - Built-in ratchet stop for accurate, repeatable readings - Calibration ring and small wrench included for adjustment Specifications and compatibility - Material: alloy measuring heads for durability and reliable performance - Internal size measurement: suitable for various bore and internal diameter checks - Adjustment: calibration ring with an included small wrench for precise calibration - Reading stability: built-in locking mechanism and ratchet stop ensure consistent results Usage scenarios - Quality control in manufacturing: verify bore sizes of sleeves, bushings, and cylinders to ensure components meet tolerances. - Assembly and maintenance: check internal diameters before fitting parts to ensure proper clearance and fit. - Equipment inspection: routinely inspect internal dimensions of interchangeable components to guarantee consistency and interchangeability. This tool offers a clear, professional solution for accurate internal measurements, combining stable locking, repeatable readings, and durable alloy heads for long lasting performance.