The MadisonPurpose built, style driven. The Madison is the younger sibling of the Mehlville, which was our very first carabiner and continues to be a constant best seller. Like the Mehlville, the Madison features a machined two compartment design to keep your keys securely attached even when getting the Madison on or off a belt loop. The Madison is machined from billet 6063 T5 aluminum, which gives it a high strength to weight ratio. The thinner design of the