Do you have a question about the Hitachi G23SR and is the answer not in the manual?
Accessory for the tool, used for tightening or loosening nuts.
Accessory, a nut used for securing the wheel, specified for AUS.
Accessory, a case for the tool, specified for Europe.
An optional accessory set that includes a pipe handle and a bolt.
An optional accessory bolt with M14 threading, part of the pipe handle set.
An optional accessory washer, likely used with bolts or nuts.