The Swanson magnetic angle finder is used to quickly determine any angle on the job. Attach it to a straight edge or carpenter square for fast layout, and also use it to determine pipe pitches. Our angle finder, model AF006M features a high-impact molded body and extra-strong magnetic strips that ensure this tool easily and reliably sticks to ferrous metal surfaces. As an added feature, the v-groove edge lets it fit perfectly onto round stock like pipe and conduit. With its black marks on a bright white surface, it is easy to read the increments that show 0-90 in all four quadrants. The durable acrylic lens offers a consistent clear view, and the chart on the back is a very useful, handy reference table.