ANSI standards, most for North American customers requirement
B107.1-2002 Socket Wrenches, Hand (Inch Series)
B107.2-2002 Socket Wrenches, Extensions, Adaptors,andUniversal Joints, Power Drive (Impact) (Inch Series)
B107.33-2002 Socket Wrenches, Impact (Metric Series)
B107.34-2003 Socket Wrenches for Spark Plugs
DIN 3124
ISO 2175
DIN 3123, sockets and accessories