Quick, off the top of your head. You need a drill bit that is a little bigger than 3/4″. What size do you need? 49/64″ Right?

You are looking for a long 5/16″ gun drill bit on Ebay. There is a great deal on a 21/64″ drill bit. Is it big enough?

The above table makes answering these questions easy! Print it out and tape it to your drill press.

Note: I obtained this ruler from Kathleen Fasanella http://Fashion-Incubator.com.