10 Best Bore Gauges 2025

When it comes to precision measurement, nothing beats a reliable bore gauge. So we rolled up our sleeves, got to work, and reviewed a vast variety of bore gauges in order to provide you with the best options out there. We're proud to present our top 10 picks for the finest bore gauges in the market! We tested and scored many products in the bore gauges category and found products ranging from a 7.2 score up to a 9.6, but one particular brand stood out from the rest: LLDSIMEX. Their 2" - 6" Bore Gauge Set, with a 0.0005" increment, was a cut above the competition. Measuring the inner diameter of cylinders, pipes and other machined bores has never been easier or more accurate, and we're confident you'll see why it's number one once you get your hands on it. Don't settle for imprecise measurements - trust LLDSIMEX to get the job done right.