Precise, versatile, and easy-to-use are the words which best describe the Incra 12-Inch Precision Marking T-Rule Think of it as a combination square for marking or measuring that's simultaneously set to every scale position with perfect, instant accuracy There are micro-fine marking holes and slots at every 1/16-, 1/32 Item Weight : 4.5 ounces Precise, versatile and easy-to-use T-Rule Combination square for marking with perfect, instant accuracy Micro-fine marking holes and slots at every 1/16-, 1/32- and 1/64-Inch scale position Locate your sharp pencil or scribe with absolute precision Limited 1-year warranty