Aftermarket Hitachi Nailer Piston Driver. This is a generic replacement driver with o-ring for the Hitachi NR83AA2, NR83AA3 & NR83AA4 guns. This comes with a patented locking mechanism which will not allow the driver to unscrew from the piston. Aluminum is crimped into the UNI-LOK grooves of the shaft to prevent unscrewing. Guaranteed never to unscrew.
Metabo HPT (Hitachi)