PROX CARD HOLDER - Compatable with and Great For HID ProxCard II Clamshell Cards VERTICAL ORIENTATION - Side Load ID Card Easily for Secure Hold SECURE FOR THICKER ID CARDS - Designed to Hold 70 to 90 mil Thickness RIGID & STURDY - Hard and Durable ABS Plastic - Card Protector SENSOR READS THROUGH HOLDER - Does Not Block RFID or PROX Signal These hard plastic badge holders do just the trick for your HID or similar "Clamshell" prox card. Hard ABS plastic to protect your card and its sensitive circuitry from bending or breaking. Your card does not need to be removed from holder when scanning or beeping in at a proximity access point.