Fowler 52-008-007-0 Dial Caliper has a covered rack that helps prevent dirt and debris from clogging the gear and helps prevent measurement errors. This dial caliper is used for measuring inside dimensions (ID), outside dimensions (OD), depths, and steps. The hardened stainless steel components, including the beam, measuring surfaces, rack, gears, and depth rod, offer corrosion resistance, increased accuracy, and long life. The hardened stainless steel beam is has a satin chrome finish to help prevent glare. Dial calipers are measuring instruments commonly used for inspection in manufacturing to provide precise measurements of an object. A bezel locking mechanism provides the ability to take differential measurements for determining the difference in measurements between two objects. Dial calipers are commonly used in fields such as metalworking, mechanical engineering, machining, and carpentry. This product has a 1-year warranty offered by Fowler High Precision. Fowler, an American company, manufactures inspection and measurement instruments such as electronic indicators, calipers, bore gauges, and micrometers. The company, founded in 1946, is headquartered in Newton, MA.