THIS IS A GUHRING INDEXABLE INSERT DRILL, MODEL 5242-17995. THE TOOL IS DESIGNED FOR DRILLING TASKS WITH A DIAMETER RANGE OF 17.01-17.99MM. KEY DIMENSIONS ARE PROVIDED IN MILLIMETERS: THE SHANK DIAMETER IS 19.05MM (3/4"), THE BODY DIAMETER IS 16.70MM, AND THE OVERALL LENGTH (OAL) IS 130.00MM. THE SHANK LENGTH IS 50.00MM. THE MAXIMUM DEPTH OF CUT IS 76.00MM, WHICH CONVERTS TO 2.990 INCHES. THE SPECIFICATIONS ALSO INDICATE THE INSERT SCREW IS F/G, SERIES/CODE: 1071 3.006.