Incra PROTRAC06 6-Inch Precision Marking Protractor Protractor lets you plot any angle with ease and absolute accuracy T-Bar and see-through crosshairs provide perfect alignment 6-inch centering scale with micro-fine marking holes at every 1/32 inches Four angle scales, including one for marking narrow stock Micro-fine guide holes at every 45-, 30-, 22.5-, 5-, 1-, and 0.5-degree intervals