General description Hammer Drill BOSCH GSB 12V-15 Professional features a compact design at just 189 mm, making it ideal for handling in tight spaces and overhead applications. It is equipped with a newly developed 2-speed planetary gearbox, providing powerful performance for screwdriving and drilling in wood, metal, and impact drilling in masonry. The drill also includes a professional quality 10 mm Auto-Lock drill chuck for easy bit changes. Technical specifications Length: 189 mm Chuck type: 10 mm Auto-Lock