Put between floors

[pctechtv]

Hello, I have a need to drop a cable to a floor under me. I need a small hole about the size of nickle. The two floors are in a Brooklyn Brown Stone (pic). There is some space that could be chipped away (reamed bigger) between the pipes, but I don't know if that is a good idea? Could someone recommend a way and the type of drill bit (if a drill is the way) needed? Thanks

[J5*]

Drill a hole using the right type of drill bit based on the material that you are drilling through , start with a small one and then go larger