Construction professionals that drill holes and drive fasteners into wood, metal or concrete need a cordless hammer drill and driver with the power to tackle a variety of hole sizes plus the compact size to get into tight work spaces. The 18-volt EY-7950 hammer drill kit excels at the variety of jobs electricians, general construction contractors, system installers, heating, water and sanitation technicians do that involve masonry, metal or wood drilling or fastening. The variable speed and reversible tool has the power to efficiently drive up to 5/16″ diameter wood and up to ¼” diameter self-drilling screws. The ½” metal heavy-duty keyless chuck allows easy bit changes, yet holds the bit firmly during drilling, hammer drilling and fastening. An electric brake stops the bit immediately when the trigger is released and an LED light illuminates the work area for accurate drilling or fastening.