Secure Key Lock Holographic Overlay with the unique Secure Key Hologram. The hologram has the letters of the word "SECURE" written above and below each skeleton key. Two skeleton keys oppose each other between the "Secure" letters. As the card is shifted, the letters Secure are obscured with lines. The hologram measures 2.125x 3.3 and fits butterfly pouches, PVC Cards perfectly. Each hologram is peel and stick and is applied manually. Each hologram is a thin 2 mil thick, allowing for discreet application. Holograms are ideal for enhancing the security of your card and increase the durability of the card surface.