Etched: Tap size and recommended drill bit size are etched on each tool for easy identification, All Hanson taps and dies are made in USA, Ideal for auto repair and machinery where metric threads are specified, The first number represents the diameter of the tap in millimeters, the second number is the distance between the threads in millimeters, Thread Size: 9 mm, Thread Pitch: 0, 75 mm, Thread Standard: Metric, Style: Plug, Material: High Carbon Steel, SKU: EGLT17746