A high precision thimble is a specialized tool used in precision engineering and metrology applications for accurate measurement of small dimensions. Typically made of hardened steel or other durable materials, it features a cylindrical body with a finely machined outer surface and a precision-ground contact surface. The contact surface is designed to make precise contact with the object being measured, allowing for accurate and repeatable measurements of diameters, depths, or hole sizes. High precision thimbles often incorporate a micrometer or digital readout mechanism for precise measurement readings, ensuring reliability and consistency in dimensional analysis. These thimbles are commonly used in industries such as machining, toolmaking, and quality control, where precise measurements are critical for ensuring product quality and performance.