Original Makita 135644-8 — Driver Ass'y. This genuine Makita driver assembly is referenced in parts lists for Makita DBN500-series nailers. It’s a direct-fit replacement that restores the piston/driver action and seals inside the nailer’s drive unit so the tool fires reliably again.

Ideal for repairs when you need a single, exact replacement part: install the 135644-8 driver assembly to get your 18‑gauge brad nailer back to factory performance (compatible nail lengths for the tool family are approximately 16–51 mm). Keep this genuine Makita component on hand when working on parts for power tools and you want a precise, uncomplicated repair.