Review on Inch and Metric Fastener Thread Checker: Bolt Your Worries Away! by Dave Giri

Helpful, straight to the point. Does not include some uncommon but common threads found in plumbing, air and gas fittings. So if you're tech savvy like me, you'll need to add a few connectors to this kit. If you're working with brake, fuel, or air lines that are SAE metric, imperial, and NPT, you'll need a different set. Additionally, if you're reaching into a hard-to-reach area, it's impossible to check the threads. Unless you disassemble the cable. Year(s) of Renewal: Relatively LOW quality metal, particularly on the SAE side. I'm always disappointed by the lack of sizes. If you work with automotive, home plumbing and vent fittings this will be a major disappointment as none of these sizes are included in this test kit.