The Brady Vertical Proximity Card Holder is designed to keep your proximity cards safe and secure. Each holder features a standard vertical, top - loading design with a lock - in slot that prevents cards from being removed when a badge strap is used. Made from 20 mil thick clear vinyl, these holders are both durable and lightweight, measuring 2.5 x 3.63 inches for the insert and 2.65 x 4.42 inches overall. They also include slot and chain holes for easy attachment, making them ideal for various identification needs.