Abstract: A holder with a block-like, flat-sided main body carrying a key-holding ring at one end and having a C-shaped opposite end portion to which a ring-like detachable body is loosely but securely coupled. The detachable body is relatively thick and has a V-shaped notch in its outside surface, and the C-shaped portion has a relatively narrow passage extending from a central opening to one side edge of the main body, a finger on one side of the passage having a V-shaped end that is sized and shaped to pass the notched portion of the ring into the opening, with a non-jamming interference fit. A second key-holding ring is secured to the detachable body at a location ninety degrees from the notch, to tend to hold the notch away from the passage.