Hammers can also be used in awkward to reach places that a nail gun can't get to. Also, structural timber is very rarely straight or true. Knocking things into

Hammers can also be used in awkward to reach places that a nail gun can't get to. Also, structural timber is very rarely straight or true. Knocking things into alignment is a very common part of framing, and hammers can achieve sub-millimetre accuracy with gentle tapping. Yes, nail guns are awesome, but hammers are very useful tools.