Designed for EMS personnel, the MedKey is an all-purpose, space-saving tool for paramedics and EMTs. It's easy to lose a O2 tank wrench or key, and far too often do backboard and stairchair strap buckles break or go missing. The MedKey can be used on CGA standard valve stems on "D" and "E" sizes of medical oxygen tanks, includes an adjustable strap or belt attachment loop, can be used as an s-ring on various pieces of equipment, and much more. The MedKey includes a keychain ring or can be easily carried in a pair of BDU pockets or attached to most standard trauma and medical equipment bags.