The Spec Ops Elite Rafter Square features deep-cut and laser-etched lines every 1/16 in. The 7-1/2 in. blade spans up to 8 in. dimensional lumber. The 7/16 in. circular saw wrench enables rapid blade changes, and Wide-Scribe guides every 1/8 in. ensure compatibility with most marking tools. A QR code links directly to the digital rafter square guide. We support our nation's heroes by donating 3 percent of proceeds to veteran and first responder causes.