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Swanson Speed® Square, 7 in. Aluminum Layout Square with Blue Book (S0101)
Swanson Speed® Square, 7 in. Aluminum Layout Square with Blue Book (S0101)
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From the brand
Innovation, since 1925.
Quality you ask for by name
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Inventors of the Speed Square
After three years of refinement, Swanson files the first die of the triangular layout tool that combines a try square, miter square, saw guide, line scriber, and protractor into a single piece.
He calls the technique the One Number method.
Fellow carpenters start asking for their own.
Thousands of Speed Squares are produced every day right here in the USA.
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Buy the tool once
Materials picked so the tool finishes the job it was bought for, then the next one.
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Designed with purpose
Each tool is built to meet or exceed the exact demands of the job it’s made for.
No feature without a reason.
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Why is it called a Speed Square?
It is called a Speed Square because it lets a carpenter make layout marks in one motion instead of the three or four required by the try squares, miter squares, and protractors it replaced.
What is Savage?
Jim and Craig launch Savage as Swanson’s pro-tier sub-brand, named for the Savage family, the Allemand brothers’ mother’s maiden name.
Who leads Swanson today?
Jim and Craig lead the company today as President and Vice President.
From the manufacturer
7 in. Speed Square, carded with the Blue Book
The original five-tools-in-one layout square: try square, miter square, saw guide, line scriber, and protractor in one heavy-gauge aluminum die-casting.
Made in the USA by Swanson Tool Company.
Look for the Diamond Cutout.
That's how you know it's a true Speed Square.
Marks a one-motion seat cut on common, hip, and valley rafters.
The 3½-inch cutout that turned seat-cut layout into one motion.
Built In, Every Detail
Includes the Blue Book
Swanson's pocket reference for roof pitch, rafter length, stair stringers, and field measurements ships with the tool.
Swanson invented the One-Number Method to mark common, hip, and valley rafters off a single pitch number.
Heavy-Gauge Die-Cast Aluminum Alloy
A heavy-gauge aluminum alloy die-cast body, 15 times stronger than standard aluminum construction.
7/8 in. Heel
The 7/8 in. heel holds the square against the board edge for square and 45° marks or to guide a circular saw.
Key Features
Deep Black Gradations
Deep black-filled markings that read true in direct sunlight.
Every gradation, rafter number, and degree mark is cast into the aluminum itself, not applied on top of it.
Matte Finish
Glare-free reading in direct sunlight.
The body doesn't blind you on a roof deck at midday like a polished square will.
1/4 in. Scribe Bar
The 1/4 in. scribe bar rips parallel layouts off that same edge.
CNC Machined
Every Speed Square is CNC machined to a perfect 45° and 90° corner.
Square marks that read true right off the pivot, cut after cut, year after year.
Speed Square
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The Big 12 Speedlite Square
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| Customer Reviews |
4.8 out of 5 stars 17,336
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4.8 out of 5 stars 1,388
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4.7 out of 5 stars 1,732
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| Price | $9.98$9.98 | $17.38$17.38 | $7.92$7.92 |
| Size | 7 in. | 12 in. | 12 in. |
| Material | Heavy-Gauge Die-Cast Aluminum Alloy | Heavy-Gauge Die-Cast Aluminum Alloy | high-impact composite |
| Weight | 0.68 lb | 1.05 lb | 0.76 lb |
| Made in | USA | USA | USA |
Product Description
Product Description
The Swanson Tool Speed Square S0101 is a versatile and reliable layout tool designed for carpenters, contractors, and DIYers who demand accuracy on every project. Crafted from heavy-gauge aluminum alloy for durability, this classic speed square functions as a try square, miter square, protractor, and saw guide—all in one compact tool. The bold black markings are easy to read and help ensure precise measurements and clean angle layouts for framing, roofing, stair building, and general construction tasks. This carded set also includes the Swanson Blue Book, a trusted pocket-sized guide filled with helpful instructions, angle charts, rafter tables, and layout tips to simplify common construction calculations. Whether you’re making quick cuts, marking angles, or laying out rafters, the Swanson Speed Square provides dependable accuracy and efficiency on the job site or in the workshop. Built for long-lasting performance, it’s an essential tool for professionals and home improvement enthusiasts alike.
From the Manufacturer
The Swanson Tool SO101 7-inch Speed Square is a popular pocket-sized square that incorporates features of the framing square, tri, miter, and protractor squares. Common rafter and hip/valley rafter scales permit one-number references for all cuts. The square is merely rotated to the proper roof pitch value on either scale to assure the correct angle cut. The slot along the scales will accommodate an adjustable locking pin for repetitive cuts using any 1/4-inch bolt and nut. Comes with a handy, 62-page pocket sized booklet that provides vital instructions, reference diagrams, and tables for the construction of roofs and stairs.













