The 12V Max Driver drill features 2-speed mechanical variable gearing for driving different size screws, while its 1,700rpm motor delivers fast driving performance. With a single sleeve keyless chuck, it has superior grip strength and holds bits securely. The 4.0Ah capacity batteries provide ample runtime to complete demanding tasks. This kit comes with two batteries and a fast charger to operate even more efficiently. - Rigid 10mm (3/8”) Keyless Chuck – allows user to quickly change between drill bits by unscrewing and tightening the drill chuck - LED Job Light – with pre-glow and after glow function, lights up the work piece making it easier to view the work area - Variable Speed Trigger – trigger has been designed so that the drill speed can be easily controlled by the trigger - CXT Compact e - Xtreme Technology – ultra compact and lightweight design allows the user to comfortably handle the tools for extended periods of time - Mechanical 2 Speed Gearing – provides the user with more control of the tool, allowing selection between 2 speeds - Ergonomic Design – In order to provide maximum thrust to the bit, the top back of the handle is ergonomically contoured and widened to perfectly fit the U-shape between thumb and index