Dial Gauge Angle Finder - Measure 0-90 Degrees - Weighted Lever -Groover Ruler Check angles with the weighted lever from 0 - 90 degrees with accuracy to 0.5 degrees - Simply put on your piece to figure out the angle; Also known as a groover ruler, which can be used on pipes - More than a flat surface ruler Takes out the guess work of many home improvement projects - A necessity for metalworking and other manufacturing jobs Built-in ruler that measures 9cm across and 6cm high; features black on white lettering and numbering and an orange indicator for an easy-to-see gauge Can be mounted to nonmetallic squares with self-threading screws (not included) Lightweight: 2.5oz - Dimensions: 3-3/4"W x 3-1/2" L x 2/5" D with a 3" face diameter; made of heavy-duty thermoplastic