These vintage magnetic card holders are a welcome addition to the hobby. I have a few vintage cards from the 1950's that I collected before grading was a thing, and struggled to find a good holder for them. These Pennysleever magnetic holders are just what I needed. Now I can nicely display and protect my '51 Bowman, '55 Topps, and '56 Topps Ted Williams cards. I asked about the possibility of these types of holders in the past. Thank you, Pennysleever, for making them a reality.