The Dewalt DCF845B is a 3-speed brushless 20V cordless 1/4 impact driver, known for its compact design and keyless chuck size. It is a powerful tool designed for efficiency and convenience, with a lithium-ion battery technology providing reliable performance. This impact driver, made by DEWALT, a trusted brand in the industry, is perfect for home and workshop use. With a 1/4 inch chuck size, brushless motor, and 9.0 ah battery capacity, this tool delivers high performance in a compact design.