Woodpeckers Precision Woodworking Tools WWR36 Woodworking Rule, 36-Inch,Woodpeckers Inc.,WWR36" /> Blade machined from aircraft-grade aluminum and anodized for surface protection and appearance Precise laser engraved markings, 1/16-inch graduations Markings engraved on a 30 degree bevel for easy alignment to pencil marks Finger groove down center to help position the rule into place Sits flat because of a recess down center of bottom surface