Achieve precise cylinder measurements with this professional 3-piece dial bore gauge set. Featuring a measurement range of 18-160mm (0.71-6.30 inches) and an accuracy of 0.01mm (0.0003 inches), this comprehensive kit is ideal for engine mechanics and machinists. The set comes housed in a sturdy wooden case with custom foam inserts, ensuring safe storage and transport of all components. Each gauge features comfortable insulated grips for enhanced control and handling during deep engine cylinder measurements. The kit includes three specialized bore gauges, a precision dial indicator, and various measurement accessories. Perfect for automotive workshops, machine shops, and professional mechanics who demand reliable, accurate internal diameter measurements. The included operation manual provides detailed instructions for proper usage and maintenance. This high-precision tool set is essential for engine rebuilding, cylinder inspection, and quality control applications.