Achieve precise internal diameter measurements with this metric telescoping gauge set, designed for professional accuracy and ease of use. The knurled satin-finish body offers a secure, positive grip for smooth adjustment, while the hardened, radius-ground plungers ensure consistent, reliable readings when used with a micrometer. Ideal for measuring bores, holes, and internal grooves in the 54–90 mm range, this tool is perfect for engineers, machinists, and workshop use. For smaller diameters, pair with a small hole gauge for complete coverage. Supplied in a practical plastic wallet for organised storage and protection.