The Grainger 14F830 is a Westward digital caliper that measures internal, external, depth and step values in decimal inches or millimeters. It has a large LCD screen with auto on/off and can measure up to 6 inches/150mm with +/-0.001"/0.02mm accuracy. The caliper features stainless steel construction, fine adjustment wheel, zero/absolute button and includes a protective case. It requires a SR44 battery. Overall, this is a precise and durable digital caliper suitable for taking basic measurements.