Steel cut spiral bevel gears provide highest level of durability and low vibration, increasing user productivity Powerful and Highly Efficient PM58 DEWALT fan cooled motor with replaceable brushes, delivers up to 7000 rotations per minute for fast cutting and grinding applications The DeWalt DCG412N is a next generation premium angle grinder featuring new XR Lithium-Ion Technology, making it specially designed for efficiency and making applications faster. Versatile it is perfect for both professionals and hobbyists. Traditionally, when compared with corded power tools, even the most efficient cordless system provided a compromise between increased portability and reduced power, between greater ease-of-use and reduced runtime. DeWalt have recognised the daily frustrations these limitations cause our end-users, and engineered the DeWalt XR FLEXVOLT system to eliminate any and all restrictions, to provide a cordless system that offers zero compromises.