DURABLE CARD FIX Card Holder, With Lanyard, Black, 10/Box (DBL818701) Box of 10Card fix with a textile necklace offers a quick, easy way to fasten company ID cards, security passes, business cards and more. The rubber pad on the inside of the card holder enables secure fastening of cards up to 1mm thick (sold separately). Safety release mechanism on the necklace automatically separates if caught or snagged on items to prevent injury in hazardous environments. General Information Manufacturer: Durable Office Products Corp.