The Magnetic-tip tape measure has a large, magnetic end hook that adheres to metal surfaces. The tape is 25 feet long. The measurements are printed on the blade every one-eighth of an inch. According to the manufacturer, the numbers and markings are protected from wear by the acrylic-coated blade. The blade is stored in a high-impact, ergonomic case. The company says the tape measure simplifies the task of measuring lengthy ducts and other objects that are difficult to reach.