The Squids 3140 Barcode Scanner Lanyard Attachments (10-Pack) are compatible with Squids 3138 and 3142 Scanner Harnesses. They easily attach to cordless barcode scanners, allowing the scanner to hang on the hip when not in use and preventing drops that could cause damage. Each attachment is secured to the harness by looping a webbing strap through a D-ring. These adjustable scanner lanyard attachments enable quick interchange for those who frequently use multiple cordles