Superior Parts SP 885-917 Aftermarket Piston Driver for Hitachi NR90AD / NR90ADPR Nailer - 884-957
Aftermarket Hitachi Nailer Piston Driver. This is a generic replacement driver with o-ring for the Hitachi NR90AD & NR90ADPR strip nail 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.