This gauge is probably one of the easiest things one will ever use when measuring for nut slot depth. If you hear a small "click" you need to file if there's no "click" you're good just make sure you use the right measurement on the gauge.

This little deal is exactly what I’ve needed for a long time…it’s simple design and operation have saved me lots of time. I’d recommend it to everyone who love their nuts perfectly cut.

It saves a lot of time not gaging. With the strings loose you can take off more of the nut as needed. Once you get within the guidelines you can tighten the strings and dial it in. Glad I finally bought one

hello, easy, beautiful, fast, my check lasted five minutes, thank you and I recommend it to everyone

It’s an amazing tool.
1st fret heights are now without guessing. A+

First one arrived damaged. Contacted seller and replacement was sent immediately. Great innovative product. Thanks.

This is so simple it’s genius. We all should be this smart. It even has a nice picture on the back showing how to use it. Joe’s video helps too.

All things from these guys are worth their weight in gold!

I don’t hear a click and how to use it is not clear , comes with no instructions

I just used this today to install a Tusq nut on a Les Paul. I used it and verified it with a digital string height gauge. Using both removes all doubt of your heights.