Professional Engine Kit: Digital Bore Gauge 2-6" & 28-Thread Checker, 0.0005" LCD, SAE/Metric ID, Cylinder Measure & Fastener Inspect

Engineered for engine builders and machinists, this bundle pairs a high-resolution Digital Bore Gauge (2-6", 0.0005") with a portable 28-size Thread Checker. Together they deliver precise cylinder measurement and instant bolt/nut identification, streamlining rebuilds and QC in automotive, CNC, and machining workflows.

• 0.0005” Precision Deep Bore Gauge : XUNTOP digital bore gauge covers 50-160mm (2-6") diameter and 150mm (6") depth,delivering ≤0.5m/s response time and 0.01mm (0.0005") resolution for rapid detection of micro deviations. Its anti-corrosion copper sleeve integrates a hardened M2.5mm (0.098") threaded tip (500k+ cycles) and optical glass sensor (±0.001mm stability), paired with a rigid Φ8mm (0.31") shaft to minimize bending, ensuring long-term accuracy in demanding environments
• Two-point contact probe:XUNTOP bore gauge’s two-point contact design detects ovality/taper (≤±0.005mm) while self-centering heads self-align on uneven surfaces. The all-metal lock with instant springback secures positioning, paired with a hardened probe (HRC60+) and chrome handle resist wear. This system reduces adjustment and wear during repetitive deep-bore (150mm/6") tasks, ensuring stability in high-vibration environments
• 12 Different Specification of Gauge: This digital bore gauge provides 12 probes (50-105mm, 5mm steps) with hardened tips (±0.003mm repeatability). 50-65mm for small/mid-sized bores (pumps, gearboxes), 70-85mm for heavy spindles, and 90-105mm for large components (turbines, cylinders). Quick-change Φ8mm shafts enable task transitions, cutting costs and downtime via one-system use
• Nut and Bolt Thread Checker:XUNTOP thread checker can recognize 28 different sizes (14 metric sizes and 14 imperial sizes), including metric thread sizes from M4 x 0.7 to M14 x 2.0, and imperial thread sizes from # 6-32 coarse threads to 1/2-20 fine threads.This comprehensive coverage makes sure that you'll always have the right tool for any project, eliminating the inconvenience of multiple trips to the hardware store.
• Fast and Accurate Checking:All pillars of the thread bolt measuring tool have been machined with high precision to meet the standard requirements.And it comes with long-lasting, easy-to-read precision laser-etched marks for clear and accurate identification of thread sizes, which ensures accurate measurement processes.It can be widely used in home workshops, garages and hardware stores.