I was looking for a steel string action guage (the credit card one) and one of them came with a set of these, which I’ve never seen before. Anyone use them?
Dan Erlewine has a good explanation/demonstration here:
Thanks!
This is more of a thing for guitar, not bass, and not to set string height per se but to match string height to fretboard radius. I don’t set my basses up in a way that matches a radius, I set them up so they feel great and don’t buzz.
If you always go for the lowest possible action without buzzing, the strings automatically follow the radius and no gauges are needed at all. It’s a built-in property of low action height.
So these are really only a factor for higher actions.
Oh wow, never thought of it in that way but makes perfect sense now. I would get buzz out then TRY to eyeball the radius. Thank you Sir.
yeah just basically go as low as you can with no buzz on each string. No need to check radius then because it is automatically following it.
I was obsessed with this tool until I watched a Luthier on YouTube just measure off the height of the strings on the 7th fret.
For my Squier P Bass, measuring 5/64” on all 4 Strings off the 7th fret is going to give me a natural curved radius anyhow.
I put these tools back in my bag and have never looked at them again. Sometimes Common Sense DOES beat G.A.S.![]()

