Abstract: A locking system for interchangeable shoes heels, each having an axial upper integral extension, includes a substantially horizontal system platform and thereabove an integral heel extension enclosure having opposing lateral sides including void spaces within the sides and internal therewith, to secure the axial extension of a heel to be selectably attached to a bottom rear of a shoe. The system also includes a pair of substantially horizontal and symmetric locking ramps, each having (i) a front and rear portion, the front portion of each ramp having a plurality of gear teeth opposing to, and interlockable with, each other; (ii) vertically disposed key receivers integral with the front portion of each locking ramp and proximal to the gear teeth; and (iii) the rear portion of each ramp moveable through the void spaces of a heel engagement structure engagement structure complemental to the heel extension enclosure, ends of the rear portions of the locking ramps normally biased in contact with each other.