This brushless twin pack includes the DHP484 brushless combi hammer drill with the DTD154 3 stage impact impact driver. Model DHP484 is a Cordless Hammer Driver Drill powered by 18V Li-ion battery. Featuring the Makita Brushless motor, precision engineered to be up to 50% more efficient than a comparative model. Without brushes in place to apply friction a Brushless motor can produce a greater measure of torque per weight. With more torque at your disposal less power is required for day to day use, adding to the motors efficiency and extending the products overall lifetime as maintenance becomes less of an issue. DHP484 Features and Benefits: Brushless motor Electric brake 2 mechanical gears. Variable speed control by trigger Forward/reverse rotation LED job light Compact Overall.