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Swanson Tool Company Aluminum 8.5-in Speed Square

Name: Swanson Tool Company Aluminum 8.5-in Speed Square
Brand: Swanson Tool Company
SKU: 5005413945
Price: 14.98 USD
Availability: InStock
Rating: 4.8 (117 reviews)

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4.8

117

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The Swanson Speed Square was first developed by company founder Albert Swanson in 1925. This innovative tool combines 5 tools into 1. Try Square, Miter Square, saw guide, line scriber and protractor. The Speed Square is die-cast for durability and accuracy. Made of heavy-gauge aerospace aluminum alloy, it is built to last. Black-filled gradations stand out against a matte finish for easy reading. The Speed Square includes the Swanson Blue Book of rafter length and roof construction and features markings for using the Swanson one-number method of rafter layout. The Swanson Speed Square is our most popular product and remains the most trusted square of its kind. Look for the Diamond cutout for Swanson quality.

Double stud wall width layout with ease
3/8”, 1/2”, 3/4” and 1-1/2” guides incorporated into the square walls for speedy marking
A quick 22-1/2 degree pitch guide for octagons and 5 pitch rafters
Full length longer scribe guide with the diamond bridge adding strength and rigidity to the square

General
Material	Aluminum	Type	Rafter square
Package Quantity	1	Color/Finish Family	Gray

Dimensions
Width (Inches)	8.5

Features
Graduations/Resolution	0.125-In	Measuring Range	7
Marking Tool Category	Other

Certifications
CA Residents: Prop 65 Warning(s)	Prop 65 WARNING(S) -

Warranty
Warranty	1-year

Miscellaneous
UNSPSC	27111800

Check out the Best Selling Squares on Lowes.com

Review

4.8 out of 5

117 Reviews

97% Recommend this product

Ratings may include incentivized customer reviews.

Read All Reviews

+ 11

What Customers Are Saying

Customers overwhelmingly praise this speed square as an essential, reliable tool for carpentry and DIY projects. The deeply etched, blackened markings are exceptionally easy to read in bright sunlight, making 45° and 90° cuts precise and straightforward. The heavy-duty aluminum construction is described as indestructible and withstands rough job-site handling while retaining accuracy over decades. The included instructional guide stands out as exceptional value, offering detailed tables and diagrams for rafter cuts, framing, and angle calculations that help both novice and experienced users. Customers consistently call it outstanding value and a must-have tool. A few mention minor paint concerns, but overall reviewers strongly recommend it.

Customer review summary generated by AI, including incentivized reviews.

117 Customer Reviews

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American made

Would Recommend

These really are great American made tools

SparkySeptember 4, 2026
Verified Purchaser

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Handy Little Tool That Gets the Job Done

Would Recommend

Bought square because I needed something quick and easy to use for my woodworking projects and general measurements around the house. It has been a great little tool to have nearby and has saved me time when marking cuts and checking angles. The smaller size feels solid and well made. The aluminum construction keeps it lightweight but still feels strong enough to handle regular use. The markings are clear and easy to read, and it's size makes it easy to carry around. This square has made it easi...

MartinezJune 27, 2026
Verified Purchaser

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Get it now for your toolbox

Would Recommend

Great tool for squaring

FlashJune 23, 2026
Verified Purchaser

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Blue Book

Would Recommend

Have had many speed squares, this on especially. Didn’t really need a new one but I bought this because it came with the “Blue Book” of knowledge! lol I lost my old one. Super helpful to have

Mike BoJune 22, 2026
Verified Purchaser

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Essential for Anyone dealing with wood

Would Recommend

Great for drawing quick, long measurement lines on lumber

KevinJune 19, 2026
Verified Purchaser

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Quality square

Would Recommend

Simple and effective

PeteJune 10, 2026
Verified Purchaser

Was this Review Helpful ?

Would Recommend

If you're wondering how durable these little jewels are, I've had one for around 50 years and it is as good as the day I bought it. It's one of the most used tools in my shop. Buy one, you'll never have to buy another, unless you lend it to your BIL and don't get it back.

ChuckJune 8, 2026

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Swanson Tool Company: Featured Videos

COMPARE PRODUCTS

		Name	Current Item Swanson Tool CompanyAluminum 8.5-in Speed Square
		Ratings	117
		Width (Inches)	8.5
		CA Residents: Prop 65 Warning(s)
		UNSPSC	27111800
Johnson LevelAluminum 7-in Rafter Square	Swanson Tool CompanyAluminum 7-in Measuring layout tool	Swanson Tool CompanyAluminum 12.0-in Measuring layout tool	Klein ToolsRafter Square, 12-Inch	Klein ToolsRafter Square, 7-Inch	Johnson LevelAluminum 7.5-in Measuring layout tool	Empire Level E2994 7-Inch High Definition Rafter Square	Johnson LevelAluminum 7-in Rafter Square	Swanson Tool CompanySWANSON TOOL S0101ASPC SPEED SQUAR 7 x7 x10 x3/16 - ALUMINUM
96	89	553	90	89	35	1	63
7	7	12	12	7.25	7.5	8	7	7

27111800	27111800	27111800	27111800	27111800	27111800	27111800	27111800	27111800