Easily carry and organize your keys with the MSTR LINX Titanium Quick-Release Key Carry System. Featuring an innovative design, the MSTR LINX key carry system provides three useful configurations. It utilizes precision interlocking shapes, enabling the rings to pass through one another. Once you add your keys on the mini LINX, switching and swapping entire sets of keys becomes quick and easy. The Carabiner Set comes with a carabiner, two mini LINX, and three key rings, which also features a hidden bottle opener. The Medium Ring Set includes one medium LINX, two mini LINX, and two key rings. In addition, the Mini Ring Set offers three mini LINX and three key rings. CNC machined from Grade 5 Titanium, each link is as durable as a piece of steel of a similar size. However, happens to be much lighter.