The BCW 1 Screw Thick Card Holder is made of high impact, crystal clear polystyrene with all of the features and benefits of a ? Inch screwdown in a compact design. Holds jersey and memorabilia cards up to 50 points 2 piece design w/brass screw Individually packaged Exterior Dimensions: 2 7/8 x 4 Interior Dimensions: 2 9/16 x 3 9/16.