Easily attach these Advantus Carabiner-Style Retractable ID Card Reels to a belt loop, case or purse strap. The carabiner-style clip offers a more secure connection and frees you from wearing ID around your neck. Each reel has a clear badge snap that connects to your employee or other identification cards (holders sold separately). The retractable cord extends up to 30 inches to allow for convenient scanning and swiping of cards and retracts easily for convenient wearing. With 20 assorted color reels per pack, these are an excellent choice for small or large office use. Advantus Corp. is dedicated to providing innovative quality products at fair prices.