The shortest 12 volt powerhouse with impact drilling function the bosch gsb 12v 15 is a very light and compact hammer drill with softgrip for comfort joblight for visibility and an auto lock 10mm chuck the gdr 12v 105 professional impact driver delivers 100 newton meters of torque turning power and it weighs less than 1 kilogram gsb 12v 15 combi drill featuresnewly developed 2 speed planetary gearbox for powerful screwdriving and drilling applications in wood and metal and impact drilling in mas