Features: High visibility, resolution, precision-etched markings. Speed is money. And finally, a fully laid-out fence. Make flat work. Our award-winning patented rotating fence easily pivots from 90 or 180 degrees for accurate flat work. A complete changer for carpenters, metal workers, and floor workers. Ergonomic, versatile, and left-hand friendly. Open up a new dimension of possibility and make your job easier. Use our exclusive jig block and thumb screw to turn the speed square into a jig! Set the jig to any mark and lock in place. For repetitive markings to save you time and money on the job site. One vial: three readings. Plumb, and 45. Designed for a quick read. The only one of its kind in the world. Specifications: Material: Plastic Size: As Shows Package Includes: 1pc Rafter Square 1pc Jig Block note: Please allow 1-2cm errors due to manual measurement. Due to difference between different monitors, the picture may not reflect the item actual color.