Bosch gdx18v li professional cordless impact driver is the most universal impact driver in the 18v class it is versatile and unique with its newly developed bit holder which combines 14quot hex and 12quot square for even more applications it boasts both high torque and speed for fast work progress when screwdriving in metal and wood it has a very short design for perfect handling even in the tightest spaces and overhead innovative coolpack batteries ensure optimum heat dissipation