You will need a hammer drill and concrete drill bits. The hammer drill vibrates in and out while rotating and the concrete bit are fluted so that the slag from the hole can be removed without overheating and destroying the bit. As it sounds that you'll not be using them frequently my suggestion is to go to Harbor Freight on 27 in Leesburg and pick up an inexpensive drill and bits there, they sell mainly inexpensive Chinese made tools, not the best quality but the work fine for one-off jobs.
If it just a couple of holes you need done send me a PM and I'll let you borrow my hammer drill and bits, I can even help out with some screws.
Don
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