Wide Range Measurement: This inner diameter gauge is designed to accurately measure hole sizes, with a measuring range of 8150 mm. It ensures precise and reliable measurements for various applications. Retractable Design: The retractable feature of this gauge allows for easy measurement and adjustment of the inner diameter. It can be extended or retracted according to specific needs, providing convenience and flexibility in usage. Adjustable and Precise: The adjustable inner diameter gauge ensures precise readings. It can be adjusted to fit snugly into the hole, resulting in accurate measurements. Its reliable performance makes it a valuable tool for professionals in different industries. Round Head for Use: With a userfriendly round head design, this gauge is easy to grip and operate. The ergonomic design enhances usability and allows for comfortable handling during measurements. 23 use scenarios or applications: Machining and manufacturing: use during setup and quality control to verify bore diameters before assembling components. Automotive and machinery maintenance: check hole and bore sizes in engines, housings, and housings for proper fit and alignment. DIY and metalworking: quickly measure hole sizes for projects requiring accurate hole dimensions and tidy fits.