Factory-Reconditioned Bostitch GF28WW-R 7.2V Cordless 28 Degree 3-1/2 in. Framing Nailer Adjustable Rafter Hook allows users to hang tool on rafters and joists Low Nail Lock-out prevents dry fire and extends tool life Depth Adjustment for precise countersink adjustments Over-Molded Comfort Grip Full Range drives 3 1/2-Inch nails