Senco Nailer Piston Driver. This is a generic driver with o-ring for the Senco FinishPro 35 Finish 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. to unscrew.

Features:

Heat treated tool steel 6150 - Rockwell hardness 50-52

Aerospace grade #2024 Aluminum piston

Mechanically locked piston driver interface