For those who are too lazy

[tsr]

to bend over to pick up still casings:

http://www.allmagnetics.com/hardware/pickuppal.htm

[Merl]

now if they could make one that would pick up brass

[BadShot]

I just use a couple of tarps gets most of it and is a ton easier than doing it the other way

[tsr]

now if they could make one that would pick up brass

Those are available at $5 an hour near any large hardware store.