A multi-fiber, fiber optic connector, said connector comprising: a housing having a first end for receiving a multi-fiber fiber optic cable and a second end having openings for said fibers from said cable; a removable key and first and second key slots (30, 30') for accepting said removable key for setting the polarity of said fibers within said connector, with said first and second key slots (30, 30') located on opposing sides of said connector, and said removable key having an extended tab portion for moving the removable key from said first and second key slots (30, 30'); and either one of guide pins or guide pin receiving holes for guiding the connection with a second connector, a boot; wherein said removable key is movable between said first and second key slots (30, 30'), said key slot with said removable key corresponding to a first active slot and said key slot without said removable key corresponding to a non-active slot, such that when said removable key is in said first key slot, resulting in said first key slot being active, said fibers are presented within said connector in a first polarity and when said removable key is moved from said first key slot to said second key slot, activating said second key slot and deactivating said first key slot, said fibers are presented within said connector in a second polarity, reversed from said first polarity, and wherein the extended tab portion of the said removable key is long enough to pass over or through the boot when the removable key is in a forward position in one of the first and second key slots (30, 30') such that said removable key can be moved between said first and second key slots with no need for specialized tools and without opening said housing. a housing having a first end for receiving a multi-fiber fiber optic cable and a second end having openings for said fibers from said cable; a removable key and first and second key slots (30, 30') for accepting said removable key for setting the polarity of said fibers within said connector, with said first and second key slots (30, 30') located on opposing sides of said connector, and said removable key having an extended tab portion for moving the removable key from said first and second key slots (30, 30'); and either one of guide pins or guide pin receiving holes for guiding the connection with a second connector, a boot; wherein said removable key is movable between said first and second key slots (30, 30'), said key slot with said removable key corresponding to a first active slot and said key slot without said removable key corresponding to a non-active slot, such that when said removable key is in said first key slot, resulting in said first key slot being active, said fibers are presented within said connector in a first polarity and when said removable key is moved from said first key slot to said second key slot, activating said second key slot and deactivating said first key slot, said fibers are presented within said connector in a second polarity, reversed from said first polarity, and wherein the extended tab portion of the said removable key is long enough to pass over or through the boot when the removable key is in a forward position in one of the first and second key slots (30, 30') such that said removable key can be moved between said first and second key slots with no need for specialized tools and without opening said housing.