air caulking gun does the same job as a hand operated caulking gun.
Except that whereas the manual-style caulking gun can wear your
hands out, an air operated caulking gun can be used for extended
periods of time with minimal effort.
Air caulking guns usually feature a variable speed trigger, air
inlet connection built into the handle, and cartridge which can
dispense a variety of caulk, adhesives and sealants