Superior Parts SP CN81200C Aftermarket Piston Driver for Max CN55 Coil Nailer - CN81200 (Japanese Carbide Blade)

Aftermarket Max Nailer Piston Driver (Japanese Carbide Blade). This is a generic replacement driver with o-ring for the Max CN55 coil nail 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.