Package Includes: as images show, 886-448 Aftermarket Piston Driver 1 pcs. Compatible With: for Hitachi N5021A 15/16" Wide Crown Stapler. Aerospace grade #2024 Aluminum piston, Mechanically locked piston driver interface. These parts install quickly to make your nailer work like new again. A brand-new, unused, unopened, undamaged item in its original packaging. Return refund: If you have any questions, you can refund in full without any problems