Kmart has the Craftsman 52154 3-Piece Screw-Out Damaged Screw Remover Set for $10 - 10% off with coupon code KMART10PSAVINGS = $9 with free in-store pickup or $6 shipping. Removes damaged Phillips, slotted, hex, Torx or square screws with any variable speed reversible drill or 1/4 in. hex driver.
Also good for getting out ear weevils. Man I hate those things.
I bought this. Can't remember where I put it though...
Useful to remove rusty or damaged screw. really works.
And one time Seagate external hard drive uses special screw so I used this to open it.
oink