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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.
Sierra wanderer
Reviewed in the United States on January 17, 2025
Very handy tool. I use it for basic measurements on lumber, and as a guide for cuts with my cordless circular saw. I guess I should build some stairs to make use of more of the features.... someday....
RA
Reviewed in the United States on December 23, 2024
Overall, this is a solid, heavy square. Not sure if I will ever use the extra pieces, as I am more of a DIY guy. As seen in the photo, quality control on printing isn't the best but it likely won't affect it's use.
Usuario
Reviewed in Mexico on August 3, 2023
Me es muy útil. De buen tamaño para usarlo también como guía para sierra circular asi como también su grosor es ancho ya que he visto otras escuadras rápidas muy delgadas. también es útil para que asiente bien la madera cuando vas a poner un tejabán. Estoy satisfecho con el producto.
robert ney
Reviewed in the United States on July 22, 2023
Works great and good quality, easy to read and solid.
R. Petry
Reviewed in the United States on July 13, 2023
Although I’m not building roofs or stairs which I would guess is the most common use. It does very well for marking 90 degree lines for easy cutting with the miter saw or to use as a guide with the circular saw. Very happy with the larger size!
Gary Greene
Reviewed in the United States on June 28, 2023
Good product. Since I have never used this tool before. I wish the instructions was better for how to use the extra pieces.
Chris S
Reviewed in the United States on October 22, 2023
I have this in 2 sizes. It’s a must-have for anyone doing a project. Helps get perfectly straight lines for cuts. Great for a novice and a professional.
G. Hernandez
Reviewed in the United States on June 22, 2022
I have Swanson squares in the 7 inch metal and plastic versions. They are incredibly accurate, each and every one. Do the "flip" test and you will see what I mean. I bought these to use to square up my table saw fence to the table. Worked great. You will find a ton of uses for these things to make sure everything from drawers to shelving units are perfectly square.
DayWalker
Reviewed in Germany on May 20, 2022
Alles super prime Händler 1A WareDanke !!!!
Pheetang
Reviewed in the United States on December 3, 2022
, I use it to check my saws and my work for square and other angles. Hoping someday to learn to use the roof part of it.
Niels van Vlerken
Reviewed in Germany on August 25, 2019
Very useful triangle. It is big so if you are looking for something easy to handle better go for the smaller version. Because it is pretty thick I find myself using it as a guide for my circular saw as well which gives easy and very straight cuts.
Alex
Reviewed in Mexico on July 28, 2018
Hacía tiempo que estaba buscando esta escuadra pues la había visto en vídeos de trabajos de carpintería y al verla en promoción en el Amazon Prime Day, la solicité junto con la de 7 pulgadas, para tener el juego. Muy útiles ambas. Las recomiendo
amitabhsaxena
Reviewed in India on October 25, 2017
poor finish.
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