For precision metalworking, machining, or any serious DIY project where measurements matter down to the thousandth of an inch, you can't beat a Starrett dial caliper. The B120A-6 is the classic 6-inch model, and it's still proudly made in the USA. The entire tool is built from hardened, satin-finish stainless steel that resists corrosion and lasts a lifetime. The easy-to-read black dial has graduations of .001\, with one full rotation equaling .100\. It measures outside dimensions (OD), inside dimensions (ID) with knife-edge contacts, and depth with the integrated rod. The split-gear design minimizes backlash for super accurate, repeatable readings, and you can operate the fine-adjustment roller with your thumb for one-handed use. The lock screw holds your measurement in place. This is the go-to tool for machinists, toolmakers, engineers, and advanced hobbyists who demand reliability and accuracy. If you're tired of cheap digital calipers that die or slip, invest in a Starrett. It's a professional-grade tool that will be on your bench for decades.
