Model # J4900

Internet #100188970

Johnson 98 in. Aluminum Cutting Guide


98 in. Aluminum Cutting Guide

  • Up to 1/80 in. accuracy
  • Designed for making straight, precise cuts
  • Works with circular saws and routers
$3499 /each
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Product Overview

The Johnson 98 in. Aluminum Cutting Level has 2 extruded aluminum rails with a patented quick-to-assemble connector that offers convenient use. The level provides accuracy up to 1/80 in. for great precision. The level can be used with circular saws or routers to obtain accurate cuts over long distances.

  • Two 49 in. extruded aluminum rails are durable
  • Accurate up to 1/80 in. for great precision
  • Quick-to-assemble connector for efficient use
  • Can be used with circular saws or routers to obtain accurate cuts over long distances
  • 2 c-clamps are included for convenience

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Brand Johnson GearWrench Harris Stalwart
Ratings (30) (0) (0) (0)
Hand Tool Type Other Other Other Other
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Assembled Depth (in.)
0.5 in
Assembled Height (in.)
96 in
Assembled Width (in.)
2.625 in
Maximum angle (degrees)


Adjustable Length
Hand Tool Type
Tools Product Type
Hand Tool
Weight Capacity (lb.)

Warranty / Certifications

Manufacturer Warranty
1 Year

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Customer Questions & Answers

How thick is this saw guide?

Asked by: JD
GOOD QUESTION. The Depth/Height assembled is 0.5 inches, but the aluminum is NOT 0.5 inches thick!!!
Answered by: SomeoneWithABrain
Date published: 2017-01-07

Can i buy 2 of these and connect them together to make a 184" guied?

Asked by: Mike
With the existing connector (bridging) hardware I would expect a 184" length to be very unstable.
Answered by: daved
Date published: 2017-05-30


Gas came down your prices did not!???Why???$$$%
Asked by: Jinglebells
Hi Jinglebells, prices of items are subject to many factors including a national average set by our corporate office along with collaboration from our manufacturers and vendors, where the merchandise is being sold, the type of materials and labor used to create the product, and other various, related aspects of online merchandising. We appreciate your business and look forward to serving you in the future. Thank you for shopping Home Depot.
Answered by: THDSupport
Date published: 2016-02-14

Why is your prices so high

Asked by: Jinglebells
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Customer Reviews

98 in. Aluminum Cutting Guide is rated 3.6 out of 5 by 30.
Rated 4 out of 5 by from Cutting guide worked well for slitting 4x8x0.060 LDPE. Center connection could be more robust, pe... Cutting guide worked well for slitting 4x8x0.060 LDPE. Center connection could be more robust, perhaps a longer/thicker connector bar with 3 screws each side.
Date published: 2017-05-30
Rated 1 out of 5 by from Poor quality control Very disappointing quality control. Three of the ends weren't square, so you can't depend on a straight line when you join them. I had to buy a metal cutting blade to square them up to be usable. Also the connector piece is a very sloppy fit, you need a staight edge to line it up when you tighten it down. The fence also needs to be a little higher, as the saw tends to climb it, ruining a staight cut. If I hadn't bent it through my own carelessness, I would have returned it for a refund.
Date published: 2015-08-25
Rated 1 out of 5 by from Not Straight I bought this guide to help cut dados with my router, but I wasn't able to do so because it's not straight. The guide is really concave. I lined it up on my marks and while both ends were in the proper place there was an obvious bend in the middle. I laid it on its side on a completely flat surface (my cast iron table saw top) and while both ends touch, there is at least a 1/4" gap in the middle. No amount of clamping could hold it in place, especially if I'm cutting long boards. This is a disappointing product.
Date published: 2015-03-22
Rated 2 out of 5 by from good price, product could be better I bought one of these decades ago, and it was a great product. I ended up giving it to my son when he bought his first home- a fixer-upper. I bought this one to replace it. It's good for the price, but nowhere near the quality of my old one. The two ends don't meet anywhere near square when joined together. In my spare time, I'll have to square it up myself.
Date published: 2015-07-21
Rated 5 out of 5 by from great for price and function great for price and simple cuts requireing a straight cut . better than trying a cut 'freehand" with power hand saw
Date published: 2012-02-07
Rated 4 out of 5 by from Great product, very helpful This item is very helpful where a straight line is necessary. Like the job of trimming a door. Use one section of the straight edge for the bottom of the door or both pieces together to trim the length of the door. Clamp the straight edge to the door where the cut is desired ("c" clamps are provided with the product) set the cirrcular saw against the straight edge, start the saw and run the length of the straight edge for the desired cut. Don't forget, you must measure from the edge of the blade to the edge of the base plate of the saw and clamp the straight edge to the door at that mark to make the cut properly. Wonderful product, I'm sure you will appreciate this product as much as I do.
Date published: 2014-09-02
Rated 4 out of 5 by from Veru useful for cutting large sheets of plywood The best use for this cutting guide is when cutting large sheets of plywood, for which it works well. My wife may also use it to help mark/cut large panels of cloth when making draperies. A very useful tool when trying to mark a long straight line (or trying to fold along a long line).
Date published: 2015-07-28
Rated 4 out of 5 by from 48"-96" cutting guide I am a print maker and need to cut down 4' X 8' sheets of material for mounting my prints, the ability to use a 4ft selection or a 8ft is a very handy feature. I use circular saws to utility knives with the guide, no issue. Over all I am happy with the cutting guide,
Date published: 2015-06-30
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