Answer:

nailer

Answer	Crossword Clue
NAILER	Carpenter, at times
NAILER	Carpenter's gadget
NAILER	Carpenter, often

NAILER	Roofer's tool
NAILER	Carpenter's tool
NAILER	Hammer applier.
NAILER	Crackajack.
NAILER	"Crackajack."
NAILER	Crackerjack.
NAILER	"Crackerjack."
NAILER	Carpenter.

NAILER	Pinner
NAILER	One busy with a hammer
NAILER	User of spads and brads
NAILER	Fastening device
NAILER	Carpenter's machine
NAILER	Hammer user
NAILER	Roofer, at times
NAILER	Hammer operator, e.g.

NAILER	Carpenter's tool, or a carpenter, at times
NAILER	A carpenter, at times
NAILER	It's faster than a hammer
NAILER	Carpenter's power tool
NAILER	Carpenter's time-saving tool
NAILER	Deck builder's tool