These Magnetic - 35 Point with Penny Sleeve have a recessed area that is large enough to accommodate the included, specially-sized sleeve. These sleeves are an added layer of protection for the enclosed card. This is especially important if you are protecting a shiny foil card, as the foil layer can get scratched if dust was on the card when it was placed in the magnetic. Using a sleeve minimizes the chance of the foil card getting scratched.
