I don't understand why it would be different for different people. That is just mind blowing to me. why would i pay 15% in tax and you be paying 30% :no:
http://www.grainger.com/Grainger/WESTWARD-Screw-Extractor-2RUL8 looks like 1/16
I would go with the Brent's link though, I have used those in the past and they are VERY nice to just have around in case of emergency.