Key holder

A holder for a plurality of graduated keys, said holder comprising:

• two or more segments each defining at least one opening therethrough, wherein each of said openings is configured to receive one of a series of graduated keys and selectively secure said key therein;
• and
• characterized in that the holder further includes a hinge connecting adjacent segments, and wherein said hinge is configured to permit movement of the adjacent segments between an aligned position and an unaligned position, wherein in said aligned position, the removal of the smaller of two graduated keys is blocked when said keys are in the openings of adjacent segments and are positioned in the same direction, and wherein in said unaligned position, graduated keys in adjacent segments are perpendicular to one another and the smaller key can be removed without interference from the larger key.