[trademarknp]

I went to a minor league baseball game and I seen that people had these binders where they had their cards signed by the players, but it was where the player could sign several cards at once it was like bam bam bam.. they didnt have to take em out of sleeves it was easy access so the player could sign em quick and you could get several autographs.. I really don't know how else to explain it

If someone understands... where can I get these binders or cardboard like things so I can get my autographs quick and easy ?
Thanks