🔧 Elevate Your Craftsmanship with Precision! 1/4 in. and 1/2 in. spaced notches for effortless scribing and layout. Bold black gradations ensure you never miss a measurement. Comes with a patented layout bar for enhanced accuracy. Crafted from heavy gauge aluminum alloy for durability and a matte finish that reduces glare. Perfect for deck framing, stairway building, and more! 12-inch precision Includes Blue Book Heavy gauge aluminum The Swanson Tool Co S0107 'Big 12' 12-Inch Speed Square Layout Tool is a professional-grade tool designed for accuracy and ease of use. Made from heavy gauge aluminum alloy, it features a matte finish to prevent glare, making it ideal for outdoor projects. With its 1/4 in. and 1/2 in. spaced notches, black gradations, and patented layout bar, this tool is perfect for both novice and experienced builders. It includes a comprehensive Blue Book for guidance, ensuring you have everything you need to achieve flawless results.