Superior Parts SP 885-918 Aftermarket Piston Driver Compatible with Hitachi NR90AE & NR90AE(S) - 885-918, 885-519 & 887491;

Aftermarket Hitachi Nailer Piston Driver. This is a generic replacement driver with o-ring for the Hitachi NR90AE, and NR90AE(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 unlock grooves of the shaft to prevent unscrewing. Guaranteed never to unscrew. WARNING: This product can expose you to chemicals which is [are] known to the State of California to cause cancer and birth defects or other reproductive harm. For more information go to www.P65Warnings.ca.gov.