Durable construction for reliable use - Built from high-quality materials for durability and a long service life - Two-point contact design helps detect geometric diameter issues such as ovality and taper Versatile and easy to maintain - Inner diameter dial features 12 interchangeable measuring heads for quick replacement and easy disassembly - Includes a sturdy storage and transport box for organized, portable use High accuracy and practical measurement capabilities - Dial indicator provides high accuracy for precise measurements - Deep bore gauge enables measuring out-of-roundness and cylinder cone without disassembling the piston Digital bore gage with wide range and precise resolution - Measuring range: 50-160 mm suitable for various diameters - Pack size: approximately 37 x 14 x 6 cm - Measurement accuracy: 0.01 mm 2-3 practical use scenarios - Automotive engine inspection: check cylinder bore ovality and taper during engine rebuild; use the deep bore gauge to assess out-of-roundness without piston disassembly - Machining and quality control: measure diameters in the 50-160 mm range on shafts, bushings, and holes; swap among the 12 interchangeable heads for different parts and sizes - Cylinder and piston assembly maintenance: verify bore conicity and related dimensions during assembly or service to ensure proper fit and performance Key attributes at a glance - Function: precision bore measurement and inspection with two-point contact for geometry checks - Compatibility: supports diameters from 50 to 160 mm with 12 interchangeable heads - Size and portability: compact pack size for storage and transport - Material and durability: high-quality materials designed for long service life - Performance: high accuracy dial indicator and deep bore gauge for efficient, non-disassembled measurements