This holder has holes for chains and clips to keep your badge always accessible. Use a strap clip to "lock-in" your card and keep it safe in the holder. This durable clear vinyl holder has a thickness of 0.02" on the front and back to protect your cards. With an Insert Size of 3 7/16" X 2 5/16" (86 X 60mm) this holder will fit a standard data/credit card. These card holders are sold in packs of 100.