Wide Range Measurement: This inner diameter gauge accurately measures hole sizes with a wide range of 8150 mm, delivering precise and reliable results for a variety of tasks. Retractable Design: The gauge features a retractable mechanism that allows for easy extension and retraction to measure and adjust the inner diameter as needed, offering convenience and flexibility during use. Adjustable and Precise: The adjustable design ensures a snug fit in the hole, enabling precise measurements and accurate readings that support efficient and correct workmanship. Round Head for Easy Use: The round head design simplifies insertion into holes and smooth operation, improving usability and comfortable handling while measuring. Practical applications Automotive maintenance: Verify bore diameters in engine components, housings, or gears to ensure proper fit and reliable operation during repairs or maintenance. Machinery assembly and manufacturing: Check bore sizes in shafts, sleeves, or housings to confirm compatibility and tolerance control during assembly. DIY and workshop projects: Assess hole sizes in metal or wood parts before drilling, tapping, or selecting matching inserts to prevent misfits.