The DeWalt DCF850N is an ultra-compact impact driver, measuring only 100mm, making it comfortable to use and ideal for confined spaces. It features a 1/4" (6.35mm) 'drop-in' bit holder for quick, one-handed bit changes and a durable design with reduced bit run-out for enhanced accuracy and longevity. Its brushless motor delivers high power, outputting up to 205Nm of torque, ensuring efficient completion of heavy applications. This impact driver is compatible with all DeWalt 18V XR battery packs. A 3x LED "Halo" light ring provides excellent illumination of the work area. For precise control, it offers 3 motor speed and torque settings, including a Precision Drive mode to prevent over-tightening and stripping of fasteners. It is suitable for general tradesmen, interior installation, dry liners, electricians, heating and plumbing engineers, HVAC installers, carpenters, cabinet installers, and fabrication shops. Applications include fastening screws, decking/timber screws, self-drilling screws/roofing screws, various anchors and fixings, LAG bolts, pilot holes, impact hole saws, and impact spade bits. This specific model includes a DeWalt DCBP034 18v Compact Powerstack Battery. The Powerstack battery utilizes stacked pouch cell technology for low impedance construction, allowing a higher rate of electron flow due to innovative internal connectors and electrodes that provide greater surface area compared to traditional cylindrical battery cells. This results in higher max watts out, delivering more power to tools and significantly increasing application speed. The stacked pouch cell batteries also offer superior thermal performance, leading to increased durability and improved cycle life.