This the 18 volt drill. It has a 1/2 chuck, LED worklight, two speed, all metal transmission, 450 in/lbs of torque, a belt clip, and 17 torque settings. To top it off, it only weighs 3.5 lbs and is only 8 in. long!
This bad boy is pretty sweet. When I first bought this set I thought what use would I have for this? Well, I found out. It works beautifully for driving screws, lag bolts, drilling, and loosening stuck bolts. It drives the screw like super fast and if the torque reaches a certain point it uses it's impact setting to easily drive it the rest of the way. Now, don't get this confused with an impact WRENCH. An impact wrench is mainly used for much beefier tasks like heavy duty automotive work or metal construction jobs. This driver also has a quick release chuck, led worklight, belt clip, and a glow in the dark rubber ring near the chuck (something I didn't notice until the other day).
I hope to use these tools for many more years (they come with a 3 year warranty) and don't expect them to fail any time soon. (I saw a video on you tube that showed the impact driver completely cracked in half and it still worked!)