Is your Hitachi NT65M2 finish nailer acting up? Might be a worn-out piston driver. This Cylinman 3-pack is exactly what you need to get it running smooth again. The part number is 885-667, and it's made to fit the Hitachi NT65M2 nail gun perfectly. You get three drivers in the pack, which is great because let's face it, having spares is never a bad idea. They're made from heat-treated tool steel (6150 grade) with a Rockwell hardness of 50-52, so they can take the pounding. The piston itself is made from aerospace-grade 2024 aluminum. Good quality replacement part to fix jams or misfires. Just double-check that your nailer model is the NT65M2 before ordering. A must-have for carpenters, DIYers, or anyone who relies on their nail gun to work right.