StewMacUnderstring Radius Gauges, Set of 9, Standard Width for Guitar Setup, for 6-String Guitars and Most 4-String Basses

Very simple to use, they work the way they're supposed to & helped with fine tuning the radius of the strings to match radius of the fretboard for playability, made of really good material, I recommend this product.

We all know these tools from StewMac are expensive, but it's for good reason. These are all you'll need for radius gauges. They are accurate on top and bottom side. Easy to use.

Smooth quality guages. Should last forever. Worth it!

Much better quality than the cheap junk elsewhere. Higher priced than others, but worth the extra cost. I’d bought one of those mega 17-piece kits (assorted gauges, scales, notched straight edge etc.) priced under $30, and the under string radius gauges were so thick, they would not fit between the strings and body at bridge. These StewMac are narrower and fit where they need to get to. Buy there.

1. They seem expensive for what you are getting.2. They are highly accurate - probably the best you will find anywhere.2a. Buy a couple of the cheaper versions and these, and you will find the others are a waste of money.3. If you have any issues, StewMac will take care of you. It is part of the higher entry cost.If these are tools you plan to use more than one time, you won't be disappointed with what you get. Highly recommended.

Great, for the purpose it was buy, Works really well.

It is stewmac so you know it is made with precision and good quality. A must have tool if you have fixed or hardtail bridges. And because I bought it through Amazon did not have to pay the high stewmac shipping cost. With much faster shipping through Amazon as well.

Well Stewmac is the best. I like getting on Amazon to keep shipping down. Learning to set up my own guitar and these and the videos are great.