Factory-Reconditioned BOSTITCH U/LPF21PL 3-1/4-Inch Low Profile Framing Nailer Uses a 21 plastic collated full round head stick nails, in lengths of 2" to 3-1/4" (50-83mm) Requires 7.5 cu ft. per minute of free air to operate at the rate of 100 nails per minute, at 80 psi The Fastener Depth Control Adjustment feature provides control of the nail drive depth Selectable trigger for easy change between sequential and contact mode Includes adjustable rafter hook