The Swanson® Speed® Square was first developed by company founder Albert Swanson in 1925. This innovative tool combines 5 tools into 1:

1.Try Square
2. Miter Square
3. Saw Guide
4. Line Scriber
5. 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 also 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 genuine Swanson® products.

Features

• The Speed® Square, made in the USA since 1925, is essential for every carpenter, construction professional, roofer, and DIYer.

• Multi-tool: Try square, miter square, saw guide, line scriber, and protractor. For what it does, the Speed® Square belongs on every tradesman's tool bench.

• Includes pocket-sized Swanson® Blue Book—a comprehensive reference guide with our One-Number® Method to help workmen make correct angle cuts for any pitched roof.

• Features: 1/4 in. spaced scribing notches and the Diamond® cutout for easy rafter seat cuts and scribing the most common and popular stud widths

• Gradations included for marking common, hip, valley, and jack rafters. Useful for determining and marking angles and making square cuts on boards.

• Heavy-gauge billet aluminum alloy construction is die-cast for increased accuracy over laser-etched and extruded stamped rafter squares.

• High-visibility, black gradations with a non-glare, matte finish for easy reading in any lighting conditions

• Use this Speed® Square to determine out-of-square corners, angles, etc.

• When used as a saw guide, the Speed® Square makes truing up a board easy

• Look for the trademarked Diamond® cutout on all of our genuine Swanson® products