FLATWORKING READY: Make flat work a breeze. Our award-winning, patented swing fence easily rotates 90 or 180 degrees for precise flat work. This is a game-changer for carpenters, metal workers, and floor workers. Ergonomic, versatile, and left-hand friendly.Opens up new dimensions of possibilities and makes your job easier. AIRLINE ALUMINUM: Durable 0.25" anodized T6 extruded aluminum. NEVER CAST ALUMINUM: We don't melt down your old soda cans like many tool manufacturers do. This is a premium CNC milled and hand assembled construction tool. You can never afford a cheap tool again. QUICK REPEAT MARKING: Turn your rafter square into a jig with our exclusive jig block and thumb screws! Set the jig to any mark and lock it in place. Reliable, repeatable marking and cutting saves you time and money on the job site. Worth the price of admission alone. Built-in level quick-read bottle provides three readings at once: horizontal, vertical, and 45 degrees. Slam it onto the header for a quick reading. Manually test. Leave your torpedo level on the truck. HIGH CONTRAST MARKINGS: High visibility, crisp resolution, precision etched markings. Speed ??is money. Finally, fully laid out fences!