The Makita 18V LXT? Lithium-Ion Brushless 3-Piece Combo Kit (model XT328M) gives you three efficient brushless tools for drilling, driving, fastening, and demolition. You also get the category?s fastest-charging 4.0Ah batteries and the expansive breadth-of-line of the Makita 18V LXT? battery platform, so your batteries will power the expanding range of Makita tools and accessories. The XT328M includes a variable speed ?? hammer driver-drill with two speed settings, and a variable speed impact driver with a full 1,500 inch-pounds of Max Torque. The recipro saw has a refined crank mechanism design that minimizes blade deflection and reduces vibration for faster, more efficient cutting. For added convenience, the 18V LXT? 4.0Ah battery has an on-board L.E.D. charge-level indicator and reaches a full charge in only 40 minutes. It?s part of Makita?s expanding 18V Lithium-Ion series, the world?s largest cordless tool line-up powered by 18V Lithium-Ion slide-style batteries. Makita 18V 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.