I went to Berlands hose of tools here in Chicago for a new cordless DEWALT 18v 1/2 inch chuck. A guy that works here says what do you ant tht piece of chit for!!! I said ok, give me your sales pitch, ,,, he showed methe new Panasonic,,, I would have never considered a anasonic befre, but OMG does thisthing kick azz....its 15.6 volts 1/2 indexed chuck, weights ALOT less than A Dewalt 18 volt and has more power, plus the battery lasts alot longer and was $100 cheaper to boot !!!!!!