The Makita? 18 V compact Lithium-Ion cordless 2-piece combo kit (CT225SYX) is built for the pro-user who demands top-in-class Lithium-Ion cordless tools for drilling, driving and fastening in a compact size. The CT225SYX includes an 18 V LXT? 1/2 in drill driver (XFD10Z) and impact driver (XDT11Z) for increased versatility. The drill driver offers two-speeds (0 to 600 rpm and 0 to 1900 rpm) and delivers up to 480 in-lb of max force. The impact driver offers variable-speed (0 to 2900 rpm and 0 to 3500 ipm) and delivers 1460 in-lb of max torque for fastening and driving applications. The kit also includes an 18 V LXT? Lithium-Ion charger, two 18 V compact Lithium-Ion batteries and tool bag. It's part of Makita? expanding 18 V LXT? system, the world's largest cordless tool system powered by 18 V Lithium-Ion slide style batteries. Makita? 18 V LXT? Lithium-Ion batteries have the fastest charge times in their categories, so they spend more time working and less time sitting on the charger. For improved tool performance and extended battery life, Makita? created Star Protection Computer Controls?. Star protection is communication technology that allows the Star protection equipped tool and battery to exchange data in real time and monitor conditions during use to protect against overloading, over discharging and overheating. For increased versatility, the tool can also be powered by Makita? 18 V LXT? Lithium-Ion batteries with the star symbol on the battery indicating star protection inside.