Help, Please: Jumbo Rough & Smooth Cards With Holes

[AnnieHilary]

Hello everyone! Thank you, administrators, for accepting my request to join!
I would greatly appreciate some expert advice on the following:
I purchased at a magic Flea Market a set of five 4.5"×7" red bicycle back cards. They are rough & smooth. The front cards are 2H, 3D, 4H, 5D and 9D. The back cards are a 2D force, and each one has quarter-size holes in them, the quantity of which corresponds to the number on the front card (except the 9D, which has a 2D force with only 6 holes.)
When I picked them up at the Flea Market, I just thought they were rough & smooth, I didn't realize until I got home that they had the holes in the 2D's. Is this an effect in itself, or part of an effect, or do I need to add them to a red back jumbo deck and do what???
This is what I get for being a magic addict!
I thank you in advance for any assistance you may offer.