Stabila's earned the right to boast, "Always Trust, Never Adjust." They're known for accuracy and dependability. Stabila guarantees that every one of their levels has been electronically calibrated and inspected and has received a certification of accuracy. The vial system, permanently epoxy-locked in the frame by a patented process, is the clearest and easiest to read of any level we've seen. Everything about these levels is quality, from the removable rubber end caps for flush measuring to the big, comfortable hand holds. But what matters most is accuracy, and these are dead-on every time. The vial fluid stays true even in wild temperatures, from -5°F to 165°F. It's German technology that's been in the works for more than a century, and it's paid off with the best for Stabila and its customers.--Kris Jensen-Van Heste