This 8-inch magnetic torpedo level Gauge. Magnetic torpedo level are equipped with the most innovative and time-saving features of any level on the market today, all in one pocket-sized, lightweight tool – perfect for civil & electrical contractors also for plumbing professionals. The four-vial design incorporates swanson’s bright view milled vial ports that capture and reflect light for increased readability and accurate measurement of 0 degree, 30 degree, 45degree and 90 degree angles. Top-read viewing windows gives an easy, straightforward view of the 0 degree and 30 degree vials. Best tool with a lifetime of accuracy.