4" Radius Blocks Essential Set, Set of 5

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4" Radius Blocks Essential Set, Set of 5

Item # 0431
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List Price $62.35
Your Price $49.88

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4" Radius Blocks Essential Set, Set of 5

About This Item

Save money with this set! Our 5 most popular sanding blocks for spot-leveling frets and fingerboards. Just add sandpaper. They make great fret-gluing cauls, too!

Create an accurate radius quickly and without guesswork.
We make these hardwood blocks for use with Stikit Abrasives, to radius a fretboard quickly, accurately and without guesswork.

Shaping fingerboards: use 80 through 220-grit
Leveling frets: use 220 through 400-grit

Set includes the 5 most popular fretboard radii used in guitar building and repair:
7.25", 9.5", 10", 12", 16"

When working on compound radius fretboards, simply change blocks as you progress along the neck.

These 4" blocks are used for spot leveling, and can also be used as a radiused clamping caul when gluing frets. The longer 8" blocks are better for consistent, full-fingerboard radius leveling.

Dimensions: 4" (101.60mm) long x 2-3/4" (69.85mm) wide

What's your radius?
Quickly find the curvature of a fingerboard or bridge with a set of radius gauges. Use them frequently to check your work as you smooth or shape a fingerboard or frets: a quick visual check keeps you from accidentally altering the shape—a mistake that's easy to make and hard to fix.

Radius Gauges


Product Instructions

Radius Block Basics

An explanation of the different uses of a radiused sanding block.

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  • 4.88 average rating from 17 reviews
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Works Great


Works great for quick leveling and radiusing of frets. Saves a lot of time and guess work when using straight blocks for the same application. Pictured is an ibanez 12 string in for a fret leveling. -Matt Dreher


Fret Work Must Have


If you are going to repair or build necks, these are a must have.


4" Radius Blocks


I love these radius blocks. There small enough to go over the higher frets where you need 'fall off'.


4" Wooden Radius-sanding Blocks


It¦s necessary for all jobs with fretboards and fretjobs.I bought set and saved money. It¦s made from good wood, with very good accuracy.


4" Radius Block


I like to glue my frets in, so I use the 4" radius blocks as clamping caul. I use both the 12" and 16" radius. The blocks are maple and stand up to clamping pressure very well. The frets in the guitar and bass (pictured) were glued using the 12" radius block. Gary Stevens


Love these!


Simple accurate tool. They make quick work of radiusing on a fingerboard.




A low price for a very good tool...!
I buy all blocks and i saved money...!

Displaying 2 of 2
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StewMac PDF Catalog, page 11 See 4" Radius Blocks Essential Set, Set of 5
on page 11 of our StewMac Digital Catalog