Material Quality : These badge holder are made of high quality alloy and durable plastic. The built in nylon rope can stretch the length of the 26inches to help you use the keys and work cards better. Safe 360 degree swivel back alligator clip for attaching to belts, pockets, lapel or lanyard.Sizing Information: The badge reel is 1 inch diameter of big round smooth surface, the center is inch diameter, approx. 26 inch retractable cord extension. Durable plastic case makes it very strong and lightweight. Twist-Free I.D. badge end fitting. Special Design and Unique Structure : This ID badge holder is made using badge reels housed in a hard plastic casing and retractable mechanism for ease of use when scanning. A heavy-duty swivel style alligator clip is on the back for securing to your clothing, uniform, or lab coat. DIY Product : These badge holders have a flat top that can DIY gluing on large buttons and beads and can then customize for your outfits. Great choice for hospitals and offices. Package included: Come with 5pcs retractable ID badges with the rotating "alligator clip" on the back.