Drilling Through Hardened Steel

[1972K20]

Ok, I've got a metal table that I want to mount a vise to. This table is 1/4" of hardened steel. So, I go to Tractor Supply and by two drill bits for metal. One smaller bit as a pilot and then the larger size 3/8 bit. (this is the bit http://www.tractorsupply.com/en/stor...-8-in-x-525-in )

So, I'm using a 18v DeWalt and using 3in1 oil and I SLOWLY start drilling. Nothing happens. Nothing at all! It just scratched the surface of the table. I did this for a while and then quit after realizing it wasn't working.

So, my question is, how do you go about drilling into such hard steel?