The Fowler 52-520-747-0 Timing Gage is small in size making it ideal for use in confined areas. The Black Dial AGD indicator gives readings in .001" and .1" per revolution of the dial hand. It features two adaptors for various applications in straight holes (14mm and 18mm). This indicator includes adjustable tolerance limit markers and comes in a fitted carton box with a full 1-year warranty offered by Fowler High Precision. Fowler, an American company, manufactures premium inspection and measuring instruments like electronic indicators, calipers, bore gages, and micrometers. The company, founded in 1946, is headquartered in Canton, MA.