1
general::
With a hand or hands, manually (as opposed to a machine or some other means). For example, This letter was delivered by hand, or You can make these drawings by hand, but computer graphics are more efficient. [Mid-1500s]
American Heritage Idioms
2
general::
Phrase(s): by hand
made by human hands and handheld tools as opposed to a machine. • This fine wooden cabinet was made by hand. • I carved this figurine by hand.
McGrawhill's American Idioms And Phrasal Verbs