Aluminum Radius-sanding Beam

  • 46 Reviews
  • Write a review

Extended length for fast, precise shaping. Create a constant radius on an unfretted fingerboard, or level installed frets with this unique tool for the professional guitar shop.

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7-1/4" radius

Item # 5640
In stock, ready to ship!



9-1/2" radius

Item # 5641
In stock, ready to ship!



10" radius

Item # 5642
In stock, ready to ship!



12" radius

Item # 5643
In stock, ready to ship!



14" radius

Item # 5644
In stock, ready to ship!



16" radius

Item # 5645
In stock, ready to ship!



20" radius

Item # 5646
In stock, ready to ship!


Total: $0.00
Quantity: 20


Radius-sanding Beam

Erick Coleman using a Radius Beam on a fret job for leveling the board, then the frets.

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Extended length for fast, precise shaping. Create a constant radius on an unfretted fingerboard, or level installed frets with this unique tool for the professional guitar shop.

The 18" long extruded aluminum block is comfortable to hold, and its stiffness and precisely machined radius assure accuracy that's not possible with a wooden block of the same length. We designed this tool for a lifetime of use in the busy shop.

Lifetime durability • Extended length
Fast, accurate fret leveling and fingerboard shaping

Dimensions: 18" long x 2-3/4" wide (457.2mm x 69.85mm)
Seven different radii are available, for popular fretboard shapes.

A great clamping caul for glue-in fret jobs!
"I use aluminum fretboard sanding blocks to hold and clamp the frets in place while the glue dries...A scrap of Neoprene on the bottom of the caul protects the frets from the texture of the machined surface, and serves as a cushion that conforms to the radius a little better, conforming to any slight variations in the fretboard."
Excerpt from Erick Coleman's book Fret Work Step-By-Step

Cut and stick!
3M Stikit Gold Paper Self-adhesive Abrasives are the right width for our leveling and radius sanding tools. Attach 80 through 220-grits for radiusing and leveling the fingerboard, and 220 through 400-grits for leveling the frets.

Works on stainless frets, too!
All of our tools are suitable for use on stainless-steel fretwire, with the exception of our Fret Tang Nippers and Fret Cutters. Modern stainless-steel fretwire is known to be harder than the traditional nickel-silver blends, but our own shop experience indicates the wire does not cause premature wear of files or sandpapers.

Product Instructions

Radius Block Basics

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

Ratings & Reviews

Aluminum Radius-sanding Beam

  • Based on 46 Reviews
Displaying 4 of 5 1 2 3 4 5
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Great tool, 

By Howard Ulyate aka Bob Knarley from Tustin, CA
(Customer's Reviews) Thursday, June 30, 2011

This is a great tool, I can't say how well it's made. It does not flex whatsoever when putting the radius on fretboards, also it makes for a great leveler of frets.

Never More Without It

By StewMike from Italia
(Customer's Reviews) Thursday, May 26, 2011

Sanding beams are the smartest tool you can use on a guitar. they turn a tricky and boring job to something easy and funny. level the fingerboard, clamp the frets for glue-in and fret leveling with the same beam is the clever thing you can do to insure the best results in a refret job. since i got them i almost don't even need to level the frets.

how could i live without it?

Great buy

By Ed Hall from England
(Customer's Reviews) Monday, April 18, 2011

Really good tool that will last for life. Forget saving a little money on a wooden one.


By dmbwoodworking from Burlington, Vt
(Customer's Reviews) Tuesday, April 05, 2011

This is the best thing to happen to my fretwork since I began making guitars 14 years ago. There is nothing like having perfectly level fret-work to make your work sing. If you are on the fence about spending the money on this, save up and get it now or you will regret it in 14 years.

Multi-purpose tool

By DhaenensGuitars from Aarschot, Belgium, Europe
(Customer's Reviews) Friday, March 25, 2011

These beams are excellent not only for leveling the fretboard and frets but also for correcting neck angles of twisted and bowed necks.

a real time saver

By Nate Clark from Ithaca, NY
(Customer's Reviews) Thursday, March 03, 2011

When used with simulated string tension this tool can save time and physical exertion. It's not a cure all but it does work great

sanding beam

By Lance from Ohio
(Customer's Reviews) Wednesday, January 26, 2011

works great for radiusing your fretboard, and your frets. I used this tool continuously when building my guitar. Glue your frets clamp it on and it holds them in!

replaces lots of other stew Mac tools

By Ian from Toronto Canada
(Customer's Reviews) Sunday, January 09, 2011

In my opinion the length and accuracy allow these to replace other fret leveling tools for sale here. My biggest problem with non truss rod old necks is the wavy fingerboards. I pull out the first four and sometimes the last few frets then sand the exposed fingerboard ends with this tool. Checking all the time with a straight edge and feeler gauges to get the alignment parallel with the top of the remaining frets. Then replace the frets and level the tops all together. Of course one could remove all the frets but I am lazy. No more short files or diamond levelers here.

Plecking for Cheap

By Mike Kalend from Lodi, CA
(Customer's Reviews) Saturday, January 08, 2011

I needed an accurate and fast way to crown my frets. Wow! I went for the plunge and am very happy. My customer can't say enough about the playability of the axe.

It simply works

By Don Pearce from London, England
(Customer's Reviews) Friday, January 07, 2011

My 12 inch radius beam made short work of leveling the frets of a cheap Strat copy. This guitar now plays easily as well as a real Fender. I bolted the neck to a flat slab of half inch plywood (plus a spacer) and screwed some side walls as guides alongside the neck to keep the sanding beam straight. I believe this to be a necessary addition - freehand is not accurate enough. The result was perfect.

Useful additions? Wet-or-dry paper long enough to fit in a single length - the join when using normal sheets tends to catch and curl up.

Displaying 4 of 5
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Shown on page 10 of our latest catalog.