A device used to drive a heavy staple{8} through multiple objects, so as to fasten them together; it has a spring mechanism which stores force as a lever is pulled by the operator's hand, and the force is released all at once to drive the staple fully into the object to be fastened.

a hand-held machine for driving staples home

Handheld staple guns are ideal for light fabrication work such as installing ceiling tiles, window screening, and insulation. Choose a model with double leverage action that can handle staples with leg lengths from 3/16 to 5/16 inch. For bigger jobs, consider renting a hammer stapler or an electric stapler. Home Improvement Encyclopedia

a useful toll for affixing shadecltoh to wood

a difficult looking, yet easy trick to do