---
product_id: 4566441
title: "Swanson Tool Co S0107 \"Big 12\" 12-Inch Speed Square Layout Tool with Blue Book"
brand: "swanson tool co., inc"
price: "€ 31.81"
currency: EUR
in_stock: true
reviews_count: 8
category: "Swanson Tool Co., Inc"
url: https://www.desertcart.ie/products/4566441-swanson-tool-co-s0107-big-12-12-inch-speed-square
store_origin: IE
region: Ireland
---

# 12-inch heavy-gauge aluminum 7 tools in 1 layout versatility Includes Swanson Blue Book guide Swanson Tool Co S0107 "Big 12" 12-Inch Speed Square Layout Tool with Blue Book

**Brand:** swanson tool co., inc
**Price:** € 31.81
**Availability:** ✅ In Stock

## Summary

> 📐 Master every cut with the Big 12 — the pro’s secret weapon in your pocket!

## Quick Answers

- **What is this?** Swanson Tool Co S0107 "Big 12" 12-Inch Speed Square Layout Tool with Blue Book by swanson tool co., inc
- **How much does it cost?** € 31.81 with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.ie](https://www.desertcart.ie/products/4566441-swanson-tool-co-s0107-big-12-12-inch-speed-square)

## Best For

- swanson tool co., inc enthusiasts

## Why This Product

- Trusted swanson tool co., inc brand quality
- Free international shipping included
- Worldwide delivery with tracking
- 15-day hassle-free returns

## Key Features

- • **Precision Meets Durability:** Crafted from heavy-gauge aluminum alloy with a matte finish to prevent glare and resist wear.
- • **Pro-Level Reference On Hand:** Comes with the pocket-sized Swanson Blue Book packed with roof and stair layout tables for instant expert guidance.
- • **All-in-One Layout Powerhouse:** Combines framing square, try square, miter square, protractor, saw guide, stair gauge, and corner finder in one sleek tool.
- • **Built for the Jobsite & Beyond:** Compact yet robust 12-inch size fits your tool belt and stands up to daily wear, ensuring it’s the last square you’ll ever need.
- • **Effortless Angle & Line Marking:** Features 1/4 in. and 1/2 in. spaced notches and black gradations for quick, accurate scribing and reading.

## Overview

The Swanson Tool Co S0107 Big 12 Speed Square is a premium 12-inch heavy-gauge aluminum layout tool that integrates seven essential carpentry functions into one. Featuring glare-resistant matte finish, precise scribing notches, and clear black gradations, it ensures fast, accurate measurements. Included is the Swanson Blue Book, a compact guide for roof and stair layouts, making this tool indispensable for professionals and serious DIYers alike. Durable, versatile, and highly rated, it’s designed to elevate your craftsmanship and keep you ahead on every project.

## Description

Product Description The Big 12® is seven tools in one: a framing square, try square, miter square, protractor, saw guide, stair gauge and out-of-square corner angle finder. It’s constructed of heavy-gauge aluminum alloy and includes the Layout Bar for use in determining out-of-square corners. Also included are the Swanson® Blue Book for roof and stairway layout and Layout Bar with hardware. From the Manufacturer Swanson's Speed Square is a popular pocket sized square that incorporates features of the framing square, tri, mitre, 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.

Review: The ultimate pocket-sized layout tool - I've owned several speed squares over the years (cheap knockoffs, bigger 12" versions, even some plastic ones), but the Swanson Tool Co. S0101 7 Inch Speed Square (Blue) is still the gold standard — it's the one I reach for almost every single time I need accurate, quick measurements on the jobsite or in my garage. After years of daily use, it's become one of those tools that feels indispensable. Build quality — built like a tank. Made of heavy-gauge aerospace aluminum alloy with a durable blue matte finish. It's tough — won't bend, warp, or rust even after getting banged around in a toolbox, dropped on concrete, or left outside in light weather. The black-filled gradations are sharp and easy to read against the blue background, no fading or wearing off. The edges are crisp for clean scribing, and the lip (heel) is perfectly square for reliable 90° marks. Features & versatility — does way more than a basic square. 7-inch size — compact enough to fit in a pocket or tool pouch, but large enough for most framing, roofing, and layout tasks. Built-in features of a framing square, tri-square, miter square, and protractor. Graduations for common, hip, valley, and jack rafters — perfect for roof pitches and angle cuts. Scribe notches for easy pencil marking. Degree scale for quick angle measurements. Comes with the famous pocket-sized Swanson Blue Book — a mini guide packed with rafter tables, conversion charts, and how-to info for roof framing. Super handy reference right on the tool. What I use it for Marking 90° cuts on lumber Checking square on frames, cabinets, decks Laying out stair stringers and roof rafters Finding angles for trim, brackets, or miter cuts Quick squaring of sheet goods or drywall As a saw guide for circular saws (the lip hooks over the board edge perfectly) Even basic measuring and scribing in tight spaces It's incredibly accurate out of the box — no need to calibrate or second-guess it. The combo of size, durability, and all-in-one functionality makes it perfect for carpenters, woodworkers, DIY homeowners, roofers, remodelers — anyone who builds or fixes things. Value is unbeatable. Usually around $10–15 (often on sale), and it lasts forever. With over 16,000+ reviews averaging around 4.8 stars, it's consistently one of the highest-rated and best-selling carpentry squares on desertcart for good reason. No gimmicks, no plastic parts that break — just a reliable, professional-grade tool at a homeowner price. If you're starting a tool collection, upgrading from a basic combo square, or just want the classic speed square that pros swear by, this Swanson S0101 is the one. It's earned a permanent spot in every tool belt I've owned. Zero complaints — highly recommend! 5 stars all day.
Review: Makes My Measurements Look Professional - Solid, accurate, and does not bend or feel flimsy. This speed square made my DIY projects look way more legit than my skill level probably deserves. Easy to read markings and comfortable to use — no guessing, no eyeballing, no regret.

## Features

- Heavy gauge aluminum alloy with matte finish to prevent glare
- 1/4 in. and 1/2 in. spaced notches to facilitate scribing lines
- Black gradations for easy reading
- Patented layout bar
- Great for deck framing and stairway building!

## Technical Specifications

| Specification | Value |
|---------------|-------|
| Best Sellers Rank | #1,699 in Tools & Home Improvement ( See Top 100 in Tools & Home Improvement ) #1 in Carpentry Squares |
| Brand | Swanson Tool Co., Inc |
| Color | Silver |
| Customer Reviews | 4.8 out of 5 stars 23,159 Reviews |
| Graduation Range | 1/4 Inches |
| Material | Aluminum |
| Product Dimensions | 12"L x 1"W |
| Style | 12" Speed Square |

## Product Details

- **Brand:** Swanson Tool Co., Inc
- **Color:** Silver
- **Graduation Range:** 1/4 Inches
- **Material:** Aluminum
- **Style:** 12" Speed Square

## Images

![Swanson Tool Co S0107 "Big 12" 12-Inch Speed Square Layout Tool with Blue Book - Image 1](https://m.media-amazon.com/images/I/51krGziF7yS.jpg)
![Swanson Tool Co S0107 "Big 12" 12-Inch Speed Square Layout Tool with Blue Book - Image 2](https://m.media-amazon.com/images/I/81VbdnD9QmL.jpg)
![Swanson Tool Co S0107 "Big 12" 12-Inch Speed Square Layout Tool with Blue Book - Image 3](https://m.media-amazon.com/images/I/61v6VSzK7xL.jpg)
![Swanson Tool Co S0107 "Big 12" 12-Inch Speed Square Layout Tool with Blue Book - Image 4](https://m.media-amazon.com/images/I/81OXsPdFJDL.jpg)
![Swanson Tool Co S0107 "Big 12" 12-Inch Speed Square Layout Tool with Blue Book - Image 5](https://m.media-amazon.com/images/I/81oK+lKos0L.jpg)

## Available Options

This product comes in different **Size, Style** options.

## Questions & Answers

**Q: Where is this square made**
A: Dont know but i personally think a framing square with stair guages works better, its kind of cheap quality

**Q: I am not a pro, I just want to do some wood working around the house here and there. Will this tool benefit me more than the 7inch version?**
A: I work as a carpenter and i have both the 7inch and a 12inch version.I carry The 7inch speed square with me all the time and use it a lot, the 12inch sqaure i keep in the toolbox because it's size makes it unpractical to carry with me and to be honest I rarly take it out and use it, maybe once or twice a month.So as for using at home I would go for the 7inch.If you occasionally need to make a longer marking then 7inch you can lay a straight board along the 90 degree side, then remove the square and make your marking. That works really well:)Hope this was useful for you!/Claes

**Q: I just bought the 12" speed square, The slot that is supposed to hold the rise portion is way to large for the supplied 1/4" bolt?  anyone else?**
A: I just bought the same exact item from two different big box retailers.  I bought and returned the first purchase because I assumed that the manufacturer had issued a recall on the item and the retailer had neglected to pull the existing stock from shelves.  Because I was beginning a critical new stair job and I had chipped the pivot point on the 15 year old 12" speed square that I already owned, I bought another one from the second retailer.  The product was defective from both retailers....and this is 10 months after your Sept. 2014 post.....apparently the problem has not been corrected by the manufacturer.

**Q: “first time to buy and use the speed square. should i start off with 6in or the 12in? Beside their size, what other difference do they have”**
A: I would suggest the 7" speed square. If you are going to be cutting a lot of 2x12's then the 12" would be handy in addition to the 7''. The 12" square comes with a layout bar for cutting stairs.

## Customer Reviews

### ⭐⭐⭐⭐⭐ The ultimate pocket-sized layout tool
*by K***. on February 5, 2026*

I've owned several speed squares over the years (cheap knockoffs, bigger 12" versions, even some plastic ones), but the Swanson Tool Co. S0101 7 Inch Speed Square (Blue) is still the gold standard — it's the one I reach for almost every single time I need accurate, quick measurements on the jobsite or in my garage. After years of daily use, it's become one of those tools that feels indispensable. Build quality — built like a tank. Made of heavy-gauge aerospace aluminum alloy with a durable blue matte finish. It's tough — won't bend, warp, or rust even after getting banged around in a toolbox, dropped on concrete, or left outside in light weather. The black-filled gradations are sharp and easy to read against the blue background, no fading or wearing off. The edges are crisp for clean scribing, and the lip (heel) is perfectly square for reliable 90° marks. Features & versatility — does way more than a basic square. 7-inch size — compact enough to fit in a pocket or tool pouch, but large enough for most framing, roofing, and layout tasks. Built-in features of a framing square, tri-square, miter square, and protractor. Graduations for common, hip, valley, and jack rafters — perfect for roof pitches and angle cuts. Scribe notches for easy pencil marking. Degree scale for quick angle measurements. Comes with the famous pocket-sized Swanson Blue Book — a mini guide packed with rafter tables, conversion charts, and how-to info for roof framing. Super handy reference right on the tool. What I use it for Marking 90° cuts on lumber Checking square on frames, cabinets, decks Laying out stair stringers and roof rafters Finding angles for trim, brackets, or miter cuts Quick squaring of sheet goods or drywall As a saw guide for circular saws (the lip hooks over the board edge perfectly) Even basic measuring and scribing in tight spaces It's incredibly accurate out of the box — no need to calibrate or second-guess it. The combo of size, durability, and all-in-one functionality makes it perfect for carpenters, woodworkers, DIY homeowners, roofers, remodelers — anyone who builds or fixes things. Value is unbeatable. Usually around $10–15 (often on sale), and it lasts forever. With over 16,000+ reviews averaging around 4.8 stars, it's consistently one of the highest-rated and best-selling carpentry squares on Amazon for good reason. No gimmicks, no plastic parts that break — just a reliable, professional-grade tool at a homeowner price. If you're starting a tool collection, upgrading from a basic combo square, or just want the classic speed square that pros swear by, this Swanson S0101 is the one. It's earned a permanent spot in every tool belt I've owned. Zero complaints — highly recommend! 5 stars all day.

### ⭐⭐⭐⭐⭐ Makes My Measurements Look Professional
*by M***A on December 20, 2025*

Solid, accurate, and does not bend or feel flimsy. This speed square made my DIY projects look way more legit than my skill level probably deserves. Easy to read markings and comfortable to use — no guessing, no eyeballing, no regret.

### ⭐⭐⭐⭐⭐ Full function speed square
*by D***D on September 20, 2025*

Exactly like it’s big brother but small enough to fit in an apron. I checked it for square and 45 degrees and it right on the money. Weighs practically nothing because of its aluminum construction and clear markings. Excellent value and perfectly square. I can stop looking for squares now since I have four different sizes up to 18”.

## Frequently Bought Together

- Swanson Tool Co S0107 "Big 12" 12-Inch Speed Square Layout Tool with Blue Book
- Swanson Tool Co S0100 Pro Carpenters Construction Aluminium Speed Square
- Johnson Level & Tool 405 Stair/Square Gauge Set – 2/Card, Brass Plated, 2 Pack

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*Product available on Desertcart Ireland*
*Store origin: IE*
*Last updated: 2026-02-23*