Works great. Well made.

Easy to use in a hurry

I use this when installing frets on a new build, as well as finding high frets on an older guitar. I hammer in the first 3 frets and check with the fret rocker. If it rocks, I hammer down the middle fret until it doesn't rock anymore. Hammer in fret #4 and check again on frets 2,3,4 , etc, all the way down the neck. With a properly prepped fingerboard, I usually only have to polish the frets. Fret levelling is not needed, along with all the re-crowning, filing etc.
I have never seen this in any trade secrets before, however Imay have just missed it.
I did call Stewmac to suggest it as a trade secret, but the person I talked to was not interested.
Personally, I think it is great technique. Saves time and fret height lost in levelling. If you don't have one, you should!!!

Good quality and easy to use.

useful and very accurat

i got this when i first started to do my own fret work, very accurate and a must have tool, i use it on all my instruments, guitars, basses and ukuleles !

What a great little tool to have! Cant beat fast shipping!

This will be handy to have to find. Uneven frets.

My main purpose for this is to demonstrate to a customer why I just quoted them a price to level the frets. It really sets their mind at ease, knowing clearly that it's required, without having to bend over and look at tiny gaps with a straight edge. A simple go-no-go tool that is nicely machined.

I had done fret checking before, but nothing was so fast and handy as the fret rocker.
Even if you only own one guitar, it will bring you peace of mind to know your frets are still as tight as the day they were installed.