Comes in sae and metric. It is extremely helpful in sizing nuts and bolts and saves a lot of guesswork.

Very durable and love how the sizes are deeply etched into each piece. I expect these will outlive me and keep working forever. Made with heavy metal and sturdy.

All the machining is nice and clean with no visible burs or nicks. There’s a plastic tag attached to one end of the cable that says “thread checker, united states’ and then lists a patent #. The only negative is that the individual tools are mounted o...  Read More

Works so darn good. Works like a champ. This really helps.

This is the third time i'm returning the sae thread checker for wrong product. Label on bag says sae but product inside is metric. That means that if the thread you're trying to measure is fixed in place, then you must rotate this tool. It is the most...  Read More