Aftermarket Piston Driver Assembly for Senco JoistPro 150XP Nailer Replaces EA0285, Superior Parts, Mfr#: SP EA0285

Aftermarket Senco Nailer Piston Driver Assembly. This is a generic replacement driver with O-Ring for the Senco JoistPro 150XP 1/2" Metal Connector Nailer. 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.