The serial number on the tool is also a date code. For tools manufactured before 2002, the first digit after the model number is the year, the next three digits are the Julian date of the day of the year. The last three digits denote the individual tool number in sequence built on that day. Example: 3 248 062 would indicate that the tool was manufactured in 1993 on the 248th day, and it was the 62nd tool manufactured that day. Tools manufacture in 2002 or later, will have an additional digit in the year. Example: 03 248 062 would indicate a 2003 manufactured date.