Superior Parts SP 884-330 Aftermarket Piston Driver for Hitachi NT65MA2, NT65MA3, NT65MA4, NT65MA4(S) Finish Nailers

Aftermarket Hitachi Nailer Piston Driver. This is a generic replacement driver with o-ring for the Hitachi NT65MA2, NT65MA3, NT65MA4, NT65MA4(S) guns. This comes with a patent pending locking mechanism which will not allow the driver to unscrew from the piston. Aluminum is crimped into the unilok grooves of the shaft to prevent unscrewing. Guaranteed never to unscrew.