Hello,
I'm kinda of newb so please forgive me for dumb questions but...
I bought the 9 tool combo 18v nicad set about a year or so back and love it, but i decided to pick up the 12v max drill / impact driver set because i wanted to add some precision to my linup and teuth be told im addicted to tools lately

I was so impressed with the 12v max combo I was thinking about picking up the impact wrench too.
Is there any diffence between the impact driver and the impact wrench besides the chock?
I got the the 1/4 in shanks in all drive sizes, 1/4, 3/8, and 1/2 (not that ill use the 1/2 drive with it anyway but).
So im trying to figure out if there is any real reason to pick up the impact wrench now.
If they are the same basic tool only advantage i can see of using the impact wrech would be shortining the size tool length by the size of the shank to drive adapter. Am i missing anything here?
It also just seems like there is allot of overlap in the linup?
Like for instance i dont quite understand the purpose of the screwdriver. I know it has torque settings but so does the drill.
Is there a specif use that would make the screwdriver a better choice then the drill or impact driver?
Im just kind of curious about the differences? Assuming if someone gets the drill / impact driver combo there not going to be buying the screwdriver.
Someone drop some knowledge on me please!
Thanks much!