The bosch gds18vli professional cordless impact driver is the first 18v impact wrench that has a flexible battery system you can make the unique choice between premium or compact batteries thanks to this bare unit impact driver the driver itself is high torque and has a high impact rate of 3 200bpm this means excellent work progress when driving rows of screws in a variety of materials the compact and short design makes for excellent handling especially when using the tool in tight compa