Duo-Fast NSP-350 Main Frame Round Head 2-Inch to 3-1/4-Inch Framing Nailer 360 degree adjustable diffuser cup allows air to be directed away from the user Angled air inlet which keeps the hose out of the way when loading nails Rubber comfort grip for greater comfort in all types of weather "On Board" allen wrench for easy adjusting and servicing PASL9