The Starrett Automatic Center Punch with Adjustable Stroke features a lightweight, knurled steel handle for a positive grip and easy handling. 130mm (5 1/4") Length, 17mm (11/16") Diameter, Heavy Duty. Starrett punches are of the highest quality on earth. As simply as they are, punches are designed for specific applications. The drives are heat treated and seasoned to absorb repetitive shock. Punches are available in a variety of types like drive pin, center, nail set, and others. Starrett tools are essential for the many products that are measured, cut, formed or assembled. They are used in a broad range of manufacturing facilities as an essential part of metalworking, the manufacturing of durable goods, for working with exotic materials and in a wide variety of traditional and newer industries such as electronics, aerospace, energy and many others. The L.S. Starrett Company, founded in 1880, manufactures more than 5,000 variations of Precision Tools, Gages, Measuring Instruments and Saw Blades for industrial, professional and consumer markets worldwide.