BOSS Professional Hammer Drill Machine Kit – Heavy Duty Power Tool Set The rotary hammer drill kit is built with advanced Germany technology for high performance and long-lasting durability. It features multi-function modes including hammer drill rotation, hammer stop, and variable speed control for precision work. The ergonomic design ensures a comfortable grip, while the included accessories—such as drill bits, chisels, and extension rods—make it suitable for concrete, wood, and metal tasks. Delivered in a sturdy carrying case, this complete kit is perfect for professionals and DIY users alike.