Metabo HPT says its cordless Duplex Nailer is designed to increase efficiency in tasks like forming concrete or building scaffolding. According to Metabo, the nailer, which accepts 6D, 8D, and 16D plastic-strip-collated Duplex nails, can drive up to 900 16D 3 1/2-inch nails per charge, and has a brushless motor that allows for longer runtimes, increased power, and extended durability. The nailer has a pivoting belt hook and a side lock switch to prevent accidental firing. Sold with a 2.5‑Ah MultiVolt battery, the nailer retails for $600. metabo-hpt.com