The Stabila 38924 24-Inch Electronic Magnetic TECH Level gives you the patented Stabila vial system and all the features you need for quick progress on all of your tasks. The Stabila 38924 features a dual-display, which let you take measurements from the top or the side for faster reads. The electronic module gives highly accurate reads in degrees, percentages, or inches-per-foot - whatever you need to set slope and pitch. You can also duplicate angles with the Stabila 38924 without looking at the displays because of audible tones that alert you. Another helpful feature are the magnets, which are a dream for structural steelwork. On top of all of that, the vial has a lifetime guarantee unless your level is bent, but thats pretty hard to do since the frame is made of an incredibly strong, yet lightweight, alloy.