The Disc-O-Bed 2XL Stack Adapter Kit is designed to help you save on sleeping space when camping. With these four steel pieces, you can safely stack 2XL Disc-O-Beds or Disc-O-Bed Single cots in minutes. Simply fit the U-clip ends onto the four, patented bed discs. As it clicks into place, you know it's secure.• Designed specifically for Disc-O-Bed 2XL systems• Used with 2 Disc-O-Bed 2XL Singles to convert to bunk• Compatible with both the round and straight bed end frame• Simple, quick, and easy to use• Store in the cot system carry bag Four steel pieces fit onto the four, patented bed discs Converts single cots to bunk Stores in the cot system carry bag